from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Producing or sufficient to produce a desired effect; fully adequate. See Synonyms at effective.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Producing the intended result; entirely adequate.
from the GNU version of the Collaborative International Dictionary of English
- adj. Producing, or having adequate power or force to produce, an intended effect; adequate; efficient; operative; decisive.
from The Century Dictionary and Cyclopedia
- Producing an effect, or the effect desired or intended; also, loosely, having adequate power or force to produce the effect: as, the means employed were effectual.
- True; veracious.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. producing or capable of producing an intended result or having a striking effect
- adj. having legal efficacy or force
Middle English effectuel, from Old French, from Late Latin effectuālis, from Latin effectus, result, effect; see effect.(American Heritage® Dictionary of the English Language, Fourth Edition)
effect + -al (Wiktionary)