verb (used with object)
- effective conjugate,
- effective current,
- effective dose
- for practical purposes; virtually: His silence was in effect a confirmation of the rumor.
- essentially; basically.
- operating or functioning; in force: The plan is now in effect.
- to go into operation; begin to function.
- to produce a result: The prescribed medicine failed to take effect.
Origin of effect
- in fact; actually
- for all practical purposes
Word Origin for effect
late 14c., "a result," from Old French efet (13c., Modern French effet) "result, execution, completion, ending," from Latin effectus "accomplishment, performance," from past participle stem of efficere "work out, accomplish," from ex- "out" (see ex-) + facere "to do" (see factitious).
Meaning "impression produced on the beholder" is from 1736. Sense in stage effect, sound effect, etc. first recorded 1881. The verb is from 1580s. Related: Effecting; effection.
see in effect; into effect; take effect; to that effect.