constant (constants plural )
1 adj You use constant to describe something that happens all the time or is always there.
usu ADJ n
(=continual)
Inflation is a constant threat..., He has been her constant companion for the last four months.
♦
constantly adv usu ADV with v, also ADV adv/adj
The direction of the wind is constantly changing...
2 adj If an amount or level is constant, it stays the same over a particular period of time.
(=stable)
The average speed of the winds remained constant.
3 n-count A constant is a thing or value that always stays the same., (Antonym: variable)
In the world of fashion it sometimes seems that the only constant is ceaseless change...