diff --git a/app/models/glossary_category.rb b/app/models/glossary_category.rb
new file mode 100644
index 0000000..b48306a
--- /dev/null
+++ b/app/models/glossary_category.rb
@@ -0,0 +1,3 @@
+class GlossaryCategory < ActiveRecord::Base
+  has_many :terms, class_name: 'GlossaryTerm', foreign_key: 'category_id'
+end
diff --git a/app/models/glossary_term.rb b/app/models/glossary_term.rb
index 778725a..645b6f0 100644
--- a/app/models/glossary_term.rb
+++ b/app/models/glossary_term.rb
@@ -1,2 +1,3 @@
 class GlossaryTerm < ActiveRecord::Base
+  belongs_to :category, class_name: 'GlossaryCategory', foreign_key: 'category_id'
 end
diff --git a/db/migrate/002_create_glossary_categories.rb b/db/migrate/002_create_glossary_categories.rb
new file mode 100644
index 0000000..7e67a73
--- /dev/null
+++ b/db/migrate/002_create_glossary_categories.rb
@@ -0,0 +1,7 @@
+class CreateGlossaryCategories < ActiveRecord::Migration[5.1]
+  def change
+    create_table :glossary_categories do |t|
+      t.string :name
+    end
+  end
+end
diff --git a/db/migrate/003_add_category_to_glossary_terms.rb b/db/migrate/003_add_category_to_glossary_terms.rb
new file mode 100644
index 0000000..8084512
--- /dev/null
+++ b/db/migrate/003_add_category_to_glossary_terms.rb
@@ -0,0 +1,5 @@
+class AddCategoryToGlossaryTerms < ActiveRecord::Migration[5.1]
+  def change
+    add_reference :glossary_terms, :category, foreign_key: true
+  end
+end
diff --git a/test/unit/glossary_category_test.rb b/test/unit/glossary_category_test.rb
new file mode 100644
index 0000000..9e8e198
--- /dev/null
+++ b/test/unit/glossary_category_test.rb
@@ -0,0 +1,9 @@
+require File.expand_path('../../test_helper', __FILE__)
+
+class GlossaryCategoryTest < ActiveSupport::TestCase
+
+  # Replace this with your real tests.
+  def test_truth
+    assert true
+  end
+end