constant
adj
1 fixed and invariable; unchanging
2 continual or continuous; incessant
constant interruptions
3 resolute in mind, purpose, or affection; loyal
n
4 something that is permanent or unchanging
5 a specific quantity that is always invariable
the velocity of light is a constant
a (Maths) a symbol representing an unspecified number that remains invariable throughout a particular series of operations
b (Physics) a theoretical or experimental quantity or property that is considered invariable throughout a particular series of calculations or experiments
7 See →
logical constant
(C14: from Old French, from Latin constans standing firm, from constare to be steadfast, from stare to stand)
♦
constantly adv