English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am so confused about unit and lesson in books. I looked up Longman Dictionary and it said "a part of book". What's the difference between them in this case?

share|improve this question
Hello Peter PAD, there are no semantic differences in the context you referred to; generally that is an editor choice. – user19148 Oct 15 '12 at 13:33
Thanks, Carlo R – Peter PAD Oct 15 '12 at 13:35
Units in textbooks may contain many lessons, or each lesson may be a separate unit. Depends on the book. – user21497 Oct 15 '12 at 14:31
up vote 4 down vote accepted

A unit is a part of something larger, while a lesson is when you are taught about something. They mean different things on their own, but in the context of a book they are just various names for sections.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.