Meaning of CONSTANT in English

CONSTANT

adj. & n.

--adj.

1. continuous (needs constant attention).

2 occurring frequently (receive constant complaints).

3 (often foll. by to) unchanging, faithful, dependable.

--n.

1. anything that does not vary.

2 Math. a component of a relationship between variables that does not change its value.

3 Physics a a number expressing a relation, property, etc., and remaining the same in all circumstances. b such a number that remains the same for a substance in the same conditions.

Derivatives:

constantly adv.

Etymology: ME f. OF f. L constare (as com-, stare stand)

Oxford English vocab.      Оксфордский английский словарь.