Meaning of EFFECTIVE in English

EFFECTIVE

adj. & n.

--adj.

1. having a definite or desired effect.

2 powerful in effect; impressive.

3 a actual; existing in fact rather than officially or theoretically (took effective control in their absence). b actually usable; realizable; equivalent in its effect (effective money; effective demand).

4 coming into operation (effective as from 1 May).

5 (of manpower) fit for work or service.

--n. a soldier available for service.

Derivatives:

effectively adv. effectiveness n.

Etymology: ME f. L effectivus (as EFFECT)

Oxford English vocab.      Оксфордский английский словарь.