Definition of “common” - English Dictionary

“common” in English

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uk /ˈkɒm.ən/ us /ˈkɑː.mən/

common adjective (USUAL)

B1 the same in a lot of places or for a lot of people:

It's quite common to see couples who dress alike.
"Smith" is a very common name in Britain.
common courtesy/decency

the basic level of politeness that you expect from someone

common knowledge

B2 a fact that everyone knows:

[ + that ] It's common knowledge that they live together.

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common adjective (SHARED)

B1 belonging to or shared by two or more people, or things:

a common goal/interest
English has some features common to many languages.
See also
for the common good

If something is done for the common good, it is done to help everyone.

make common cause with sb formal

to act together with someone in order to achieve something:

Environmental protesters have made common cause with local people to stop the motorway being built.

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uk /ˈkɒm.ən/ us /ˈkɑː.mən/

common noun (SHARED)

have sth in common

B1 to share interests, experiences, or other characteristics with someone or something:

We don't really have much in common.
in common with sb/sth

C1 in the same way as someone or something:

In common with many mothers, she feels torn between her family and her work.

(Definition of “common” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“common” in American English

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us /ˈkɑm·ən/

common adjective (USUAL)

found frequently in many places or among many people:

Money worries are a common problem for people raising children.

common adjective (SHARED)

[ not gradable ] belonging to or shared by two or more people or things:

Guilt and forgiveness are themes common to all of her works.
adverb us /ˈkɑm·ən·li/

"The" is the most commonly used word in English.

commonnoun [ C ]

us /ˈkɑm·ən/

common noun [ C ] (LAND)

an area of grassy land that is open for everyone to use, usually near the center of a town or city:

The Boston Common is the oldest park in the US.

(Definition of “common” from the Cambridge Academic Content Dictionary © Cambridge University Press)