- adequate to accomplish a purpose; producing the intended or expected result: effective teaching methods; effective steps toward peace.
- actually in operation or in force; functioning: The law becomes effective at midnight.
- producing a deep or vivid impression; striking: an effective photograph.
- prepared and available for service, especially military service.
- a member of the armed forces fit for duty or active service.
- the effective total of a military force.
Origin of effective
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for effectives
By the returns, Cleburne's brigade was the largest, having 2,750 effectives.From Fort Henry to Corinth
Manning Ferguson Force
As we had only seven effectives, and they had more than forty, it was no slight task.Marmaduke Merry
William H. G. Kingston
The Southern army amounted to about seventeen hundred effectives.The Life of George Washington, Vol. 3 (of 5)
Washington's army at New York numbered about 19,000 effectives.The Political History of England - Vol. X.
The effectives, including militia, did not exceed eleven thousand.The Life of George Washington, Vol. 2 (of 5)
- productive of or capable of producing a result
- in effect; operativeeffective from midnight
- producing a striking impression; impressivean effective entrance
- (prenominal) actual rather than theoretical; realthe effective income after deductions
- (of a military force, etc) equipped and prepared for action
- physics (of an alternating quantity) having a value that is the square root of the mean of the squares of the magnitude measured at each instant over a defined period of time, usually one cycleSee also root mean square
- a serviceman who is equipped and prepared for action
Word Origin and History for effectives
late 14c., from French effectif, from Latin effectivus "productive, effective," from effect-, stem of efficere (see effect (n.)). Effectively in the sense of "actually" is attested by 1650s. Related: Effectivity.