Effect  —n. 1 result or consequence of an action etc. 2 efficacy (had little effect). 3 impression produced on a spectator, hearer, etc. (lights gave a pretty effect; said it just for effect). 4 (in pl.) Property. 5 (in pl.) Lighting, sound, etc., giving realism to a play, film, etc. 6 physical phenomenon (doppler effect; greenhouse effect). —v. Bring about (a change, cure, etc.).  bring (or carry) into effect accomplish. Give effect to make operative. In effect for practical purposes. Take effect become operative. To the effect that the gist being that. To that effect having that result or implication. With effect from coming into operation at (a stated time). [latin: related to *fact]