Main entry: effective, effectual, efficacious
Definition: producing or capable of producing an intended result or having a striking effect
Usage: an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation-LewisMumford; effective teaching methods; effective steps toward peace; made an effective entrance; his complaint proved to be effectual in bringing action; an efficacious law
Antonyms: uneffective, ineffective, ineffectual
Definition: not producing an intended effect
Antonyms: unimpressive
Definition: not capable of impressing
Main entry: in effect, in force, good, effective
Definition: exerting force or influence
Usage: the law is effective immediately; a warranty good for two years; the law is already in effect (or in force)
Antonyms: inoperative
Definition: not working or taking effect
Main entry: effective
Definition: existing in fact; not theoretical; real
Usage: a decline in the effective demand; confused increased equipment and expenditure with the quantity of effective work done
Definition: existing in possibility
Antonyms: nonexistent
Definition: not having existence or being or actuality
Main entry: effective, efficient
Definition: able to accomplish a purpose; functioning effectively
Usage: people who will do nothing unless they get something out of it for themselves are often highly effective persons...-G.B.Shaw; effective personnel; an efficient secretary; the efficient cause of the revolution
Antonyms: incompetent
Definition: not qualified or suited for a purpose
Antonyms: unqualified, incompetent
Definition: legally not qualified or sufficient
Main entry: effective
Definition: ready for service
Usage: the fort was held by about 100 effective soldiers
Antonyms: inactive, nonoperational
Definition: (military) not involved in military operations
Main entry: effective
Definition: works well as a means or remedy
Usage: an effective reprimand; a lotion that is effective in cases of prickly heat
Antonyms: inefficacious
Definition: lacking the power to produce a desired effect