Definition of common sense
- She's very smart but doesn't have a lot of common sense.
- rely on common sense for personal safety
You really should go to see a doctor if your leg hurts that much. It's just common sense!
Obey the laws and use common sense when operating your boat.
She's very smart but she doesn't have a lot of common sense.
: the ability to think and behave in a reasonable way and to make good decisions
What made you want to look up common sense? Please tell us where you read or heard it (including the quote, if possible).