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English definition of “constant”

constant

adjective uk   /ˈkɒn.stənt/ us    /ˈkɑːn-/

constant adjective (FREQUENT)

B2 happening a lot or all the time: He's in constant trouble with the police. machines that are in constant use

constant adjective (STAYING SAME)

C2 staying the same, or not getting less or more: We've kept up a fairly constant speed. The fridge keeps food at a constant temperature.

constant adjective (LOYAL)

describes a companion or friend who is loyal to you

constant

noun [C] uk   /ˈkɒn.stənt/ us    /ˈkɑːn-/ specialized
a particular number or amount that never changes
(Definition of constant from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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