Definition of constant in English:


Syllabification: con·stant
Pronunciation: /ˈkänstənt



Back to top  
  • 1A situation or state of affairs that does not change: the condition of struggle remained a constant
    More example sentences
    • But during the tiny sliver of human history that has seen us attempt to claim the stars as our own, Clarke has remained a bedrock - a constant throughout the struggle.
    • But the constants remain - Mauao, the beautiful beach and lots of young people.
    • Modes of transport progressed from frontpack to trike to toddling feet as our trio of offspring grew, but the pull-behind grocery cart remained a constant.
    unchanging factor, given
  • 1.1 Mathematics A quantity or parameter that does not change its value whatever the value of the variables, under a given set of conditions.
    More example sentences
    • By the ‘subject matter of pure mathematics’ he means the ‘continuous quantity’ of geometry and the numerical values of variables and constants in algebra.
    • Since its differences are the same as the Fibonacci series differences, we can add or subtract a constant to the Fibonacci series.
    • He calculated the constant to 16 decimal places.
  • 1.2 Physics A number expressing a relation or property that remains the same in all circumstances, or for the same substance under the same conditions.
    More example sentences
    • The diffraction constant for the diffractometer was calculated using a grating with 0.1 turn spacings.
    • Thus, to interpret the values, some effective temperature must be chosen and this is accomplished by calibrating the force constants to some known property.
    • The importance of the constant is that it measures the strength of the electromagnetic interaction.


late Middle English (in the sense 'staying resolute or faithful'): from Old French, from Latin constant- 'standing firm', from the verb constare, from con- 'with' + stare 'stand'. The noun senses date from the mid 19th century.

More definitions of constant

Definition of constant in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day grotesquerie
Pronunciation: grəʊˈtɛskəri
grotesque quality or grotesque things collectively