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effective margin
effective spread
effective striking price
effective tariff rate
effectively
effector
effects-based
effects box
effectual
effectuate
effeminate
effendi
efferent
efferent neuron
effervesce
effervescent
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effective

ef·fec·tive [ i féktiv ]


adjective 
Definition:
 
1. producing result: causing a result, especially the desired or intended result
an effective remedy for headaches

2. producing favorable impression: successful, especially in producing a strong or favorable impression on people
effective use of imagery

3. actual: actual or in practice, even if not officially or theoretically so
was the effective leader during the premier's illness

4. officially in force: officially in force, operative, or applicable
a regulation effective as of next month

5. U.S. true as rate of interest: describes the true or actual rate of interest that is paid on an interest-bearing account

6. ready for action: fully equipped and ready for military action



noun  (plural ef·fec·tives)
Definition:
 
military personnel or equipment: a soldier, military unit, or piece of military equipment that is ready for action


ef·fec·tive·ness noun
ef·fec·tiv·i·ty [ è fek tívvətee ] noun

Word Key: Synonyms
effective, efficient, effectual, efficacious
CORE MEANING: producing a result

effective causing a result, especially the desired or intended result;
an effective solution to the water supply problem
efficient capable of achieving the desired result with the minimum use of resources, time, and effort;
an efficient use of personnel
effectual (formal) potentially successful in producing a desired or intended result;
This idea exerts a direct and effectual influence on his thinking.
efficacious (formal) having the power to achieve a desired result, especially an improvement;
Diet may be as efficacious as medication in controlling the condition.
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