Producing a decided or decisive effect.
approximate; Not describing the fundamental dynamic changes in some system as they happen.
Efficient, serviceable, or operative, available for useful work.
Having no negative coefficients.
Having the power to produce a required effect or effects.
Actually in effect.
a soldier fit for duty
Obtaining approbation; specifically pleasing; apparently right; specious.
Seemingly or apparently valid, likely, or acceptable; conceivably true or likely.