Meanings1thickThe measured distance between one side of an object and the other side being long.2large; broadThe size of a group being larger than the average.Examples from Lessons (3)겨울에는 두꺼운 코트가 따뜻해요.Thick coats are warm in the winter.Read the Lesson 책상 위에는 두꺼운 사전이 있어요.There is a thick dictionary on the desk.Read the Lesson 책이 조금 두꺼워요.The book is a little thick.Read the Lesson Grammar in These Examples-ㄴ/은Level 1Adjective noun modifier-아/어Level 1Informal ending-요FoundationsPoliteness marker