verb (used with object)
- 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
British Dictionary definitions for in effect
- in fact; actually
- for all practical purposes
Word Origin for effect
Word Origin and History for in 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.
Medicine definitions for in effect
Idioms and Phrases with in effect (1 of 2)
For all practical purposes, as in This testimony in effect contradicted her earlier statement. [Late 1500s]
In or into operation, as in This law will be in effect in January. Related phrases include go into effect and take effect, which mean “become operative,” as in This law goes into effect January 1, or It takes effect January 1. Similarly, put into effect means “make operative,” as in When will the judge's ruling be put into effect? [Late 1700s] Also see in force, def. 2.
Idioms and Phrases with in effect (2 of 2)
see in effect; into effect; take effect; to that effect.