commonexpression
nounUK /ˌkɒmən ɪkˈspreʃən/
US /ˌkɑːmən ɪkˈspreʃən/
A common expression is a group of words that people often say together.
"Break a leg" is a common expression people say before a show.
RELATED WORDS
OTHER MEANINGS
2. A familiar look on someone's face that shows a feeling.
Her common expression of surprise made everyone laugh.
3. A usual way of showing a thought or feeling in math or logic.
In algebra, x + 2 is a common expression for adding two.
4. A phrase used often in a certain job or group.
"Copy that" is a common expression among radio operators.