diff --git a/lib/enum_fields.rb b/lib/enum_fields.rb
index 6455af0..b4c18a8 100644
--- a/lib/enum_fields.rb
+++ b/lib/enum_fields.rb
@@ -18,6 +18,19 @@ module EnumFields
 
   autoload :Definition
   autoload :EnumField
+  autoload :Registry
+
+  def self.registry
+    @registry ||= Registry.new
+  end
+
+  def self.register(...)
+    registry.register(...)
+  end
+
+  def self.clear_registry!
+    @registry = nil
+  end
 
   include Base
 end
diff --git a/lib/enum_fields/enum_field.rb b/lib/enum_fields/enum_field.rb
index 78cdc5b..d241d99 100644
--- a/lib/enum_fields/enum_field.rb
+++ b/lib/enum_fields/enum_field.rb
@@ -15,6 +15,7 @@ def initialize(model_class:, accessor:, definition:, options: {})
     end
 
     def define!
+      register!
       store_definition!
       define_class_methods!
       define_class_value_accessors!
@@ -29,6 +30,14 @@ def define!
 
     private
 
+    def register!
+      EnumFields.register(
+        model_class: @model_class,
+        accessor: @accessor,
+        definition: @definition.data
+      )
+    end
+
     def store_definition!
       @model_class.enum_fields[@accessor] = @definition.data
     end
diff --git a/lib/enum_fields/registry.rb b/lib/enum_fields/registry.rb
new file mode 100644
index 0000000..4bd4f72
--- /dev/null
+++ b/lib/enum_fields/registry.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+module EnumFields
+  class Registry < SimpleDelegator
+    def initialize
+      @store = {}.with_indifferent_access
+      super(@store)
+    end
+
+    def register(model_class:, accessor:, definition:)
+      key = model_class.name&.underscore || model_class.object_id.to_s
+      @store[key] ||= {}.with_indifferent_access
+      @store[key][accessor] = definition
+    end
+  end
+end
diff --git a/spec/enum_fields/registry.spec.rb b/spec/enum_fields/registry.spec.rb
new file mode 100644
index 0000000..d9d8639
--- /dev/null
+++ b/spec/enum_fields/registry.spec.rb
@@ -0,0 +1,293 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe EnumFields::Registry do
+  let(:status_definitions) do
+    {
+      pending: { value: "pending", label: "Pending" },
+      active: { value: "active", label: "Active" },
+    }
+  end
+
+  let(:role_definitions) do
+    {
+      admin: { value: "admin", label: "Admin" },
+      member: { value: "member", label: "Member" },
+    }
+  end
+
+  describe ".registry" do
+    it "returns a Registry instance" do
+      expect(EnumFields.registry).to be_a(described_class)
+    end
+
+    it "returns the same instance across calls" do
+      expect(EnumFields.registry).to equal(EnumFields.registry)
+    end
+  end
+
+  describe ".register" do
+    let(:model_class) do
+      Class.new(MockActiveRecord::Base) do
+        include EnumFields
+
+        def self.name
+          "User"
+        end
+      end
+    end
+
+    before do
+      EnumFields.register(model_class: model_class, accessor: :status, definition: status_definitions)
+    end
+
+    it "stores the definition under the snake_case model key" do
+      expect(EnumFields.registry[:user]).to be_present
+    end
+
+    it "stores the definition under the accessor" do
+      expect(EnumFields.registry[:user][:status]).to match(status_definitions)
+    end
+
+    it "supports string key access" do
+      expect(EnumFields.registry["user"]).to be_present
+    end
+
+    context "with multiple fields on the same model" do
+      before do
+        EnumFields.register(model_class: model_class, accessor: :role, definition: role_definitions)
+      end
+
+      it "stores both fields under the same model key" do
+        expect(EnumFields.registry[:user][:status]).to match(status_definitions)
+        expect(EnumFields.registry[:user][:role]).to match(role_definitions)
+      end
+    end
+
+    context "with a multi-word model name" do
+      let(:model_class) do
+        Class.new(MockActiveRecord::Base) do
+          include EnumFields
+
+          def self.name
+            "UserNotification"
+          end
+        end
+      end
+
+      before do
+        EnumFields.register(model_class: model_class, accessor: :status, definition: status_definitions)
+      end
+
+      it "uses snake_case for the key" do
+        expect(EnumFields.registry[:user_notification]).to be_present
+      end
+    end
+
+    context "with a namespaced model" do
+      let(:model_class) do
+        Class.new(MockActiveRecord::Base) do
+          include EnumFields
+
+          def self.name
+            "Admin::User"
+          end
+        end
+      end
+
+      before do
+        EnumFields.register(model_class: model_class, accessor: :status, definition: status_definitions)
+      end
+
+      it "uses the underscored namespace path as key" do
+        expect(EnumFields.registry["admin/user"]).to be_present
+      end
+    end
+  end
+
+  describe "#to_h" do
+    let(:user_class) do
+      Class.new(MockActiveRecord::Base) do
+        include EnumFields
+
+        def self.name
+          "User"
+        end
+      end
+    end
+
+    let(:order_class) do
+      Class.new(MockActiveRecord::Base) do
+        include EnumFields
+
+        def self.name
+          "Order"
+        end
+      end
+    end
+
+    context "with nothing registered" do
+      it "returns an empty hash" do
+        expect(EnumFields.registry.to_h).to eq({})
+      end
+    end
+
+    context "with a single field on one model" do
+      before do
+        EnumFields.register(model_class: user_class, accessor: :status, definition: status_definitions)
+      end
+
+      it "returns the model key with its field" do
+        expect(EnumFields.registry.to_h).to match({
+          "user" => { "status" => status_definitions },
+        })
+      end
+    end
+
+    context "with two fields on the same model" do
+      before do
+        EnumFields.register(model_class: user_class, accessor: :status, definition: status_definitions)
+        EnumFields.register(model_class: user_class, accessor: :role, definition: role_definitions)
+      end
+
+      it "returns the model key with both fields" do
+        expect(EnumFields.registry.to_h).to match({
+          "user" => {
+            "status" => status_definitions,
+            "role" => role_definitions,
+          },
+        })
+      end
+    end
+
+    context "with multiple models" do
+      let(:order_status_definitions) do
+        {
+          pending: { value: "pending", label: "Pending" },
+          shipped: { value: "shipped", label: "Shipped" },
+        }
+      end
+
+      before do
+        EnumFields.register(model_class: user_class, accessor: :status, definition: status_definitions)
+        EnumFields.register(model_class: user_class, accessor: :role, definition: role_definitions)
+        EnumFields.register(model_class: order_class, accessor: :status, definition: order_status_definitions)
+      end
+
+      it "returns all models with their fields" do
+        expect(EnumFields.registry.to_h).to match({
+          "user" => {
+            "status" => status_definitions,
+            "role" => role_definitions,
+          },
+          "order" => {
+            "status" => order_status_definitions,
+          },
+        })
+      end
+    end
+  end
+
+  describe "integration with enum_field" do
+    let(:user_class) do
+      Class.new(MockActiveRecord::Base) do
+        include EnumFields
+
+        def self.name
+          "User"
+        end
+      end
+    end
+
+    let(:order_class) do
+      Class.new(MockActiveRecord::Base) do
+        include EnumFields
+
+        def self.name
+          "Order"
+        end
+      end
+    end
+
+    before do
+      stub_const("User", user_class)
+      stub_const("Order", order_class)
+
+      User.enum_field :status, status_definitions
+      User.enum_field :role, role_definitions
+      Order.enum_field :status, { pending: { value: "pending" }, shipped: { value: "shipped" } }
+    end
+
+    it "registers fields when enum_field is called" do
+      expect(EnumFields.registry[:user]).to be_present
+      expect(EnumFields.registry[:order]).to be_present
+    end
+
+    it "contains all fields for User" do
+      expect(EnumFields.registry[:user].keys).to contain_exactly("status", "role")
+    end
+
+    it "contains all fields for Order" do
+      expect(EnumFields.registry[:order].keys).to contain_exactly("status")
+    end
+
+    it "stores the correct definition data" do
+      expect(EnumFields.registry[:user][:status][:pending][:value]).to eq("pending")
+      expect(EnumFields.registry[:user][:status][:active][:value]).to eq("active")
+    end
+
+    it "lists all registered model keys" do
+      expect(EnumFields.registry.keys).to contain_exactly("user", "order")
+    end
+  end
+
+  describe ".clear_registry!" do
+    let(:model_class) do
+      Class.new(MockActiveRecord::Base) do
+        include EnumFields
+
+        def self.name
+          "User"
+        end
+      end
+    end
+
+    before do
+      EnumFields.register(model_class: model_class, accessor: :status, definition: status_definitions)
+    end
+
+    it "clears the registry via the module method" do
+      expect(EnumFields.registry.keys).to be_present
+
+      EnumFields.clear_registry!
+
+      expect(EnumFields.registry.keys).to be_empty
+    end
+
+    it "returns a fresh Registry instance after clearing" do
+      old_registry = EnumFields.registry
+
+      EnumFields.clear_registry!
+
+      expect(EnumFields.registry).not_to equal(old_registry)
+      expect(EnumFields.registry).to be_a(described_class)
+    end
+  end
+
+  describe ".register with an anonymous model class" do
+    let(:model_class) do
+      Class.new(MockActiveRecord::Base) do
+        include EnumFields
+      end
+    end
+
+    it "falls back to object_id as the key" do
+      EnumFields.register(model_class: model_class, accessor: :status, definition: status_definitions)
+
+      expected_key = model_class.object_id.to_s
+      expect(EnumFields.registry[expected_key]).to be_present
+      expect(EnumFields.registry[expected_key][:status]).to match(status_definitions)
+    end
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 77d4ba8..cff2bc6 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -11,4 +11,6 @@
   config.disable_monkey_patching!
   config.filter_run_when_matching :focus
   config.pattern = "**/*.spec.rb"
+
+  config.before { EnumFields.clear_registry! }
 end