Meaning of “constant” in the English Dictionary

"constant" in British English

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constantadjective

uk /ˈkɒn.stənt/ us /ˈkɑːn.stənt/

constantnoun [ C ]

uk /ˈkɒn.stənt/ us /ˈkɑːn.stənt/ specialized

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

"constant" in American English

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constantadjective

us /ˈkɑn·stənt/

constant adjective (CONTINUOUS)

nearly continuous or very frequent:

We had a constant stream of visitors.

Constant also means not changing, or staying the same:

Even in this age of high technology, the popularity of hunting and fishing remains constant.
constantly
adverb [ not gradable ] us /ˈkɑn·stənt·li/

They worry constantly about their weight.

constantnoun [ C ]

us /ˈkɑn·stənt/

constant noun [ C ] (QUANTITY)

mathematics a number or value that does not change

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