adjective
1.
being at work or in effective operation
marginal mines that are active only when prices are high
Synonyms: alive, dynamic, functioning, live, operative, running, working
Related Word: assiduous, busy, diligent, industrious; energetic, strenuous, vigorous; alert, wide-awake; rushing
Contrasted words: dormant, latent, quiescent; idle, inert, passive, supine; dead, dull, slow
Antonyms: inactive; abeyant
2.
Synonyms: agile , brisk, brisky, catty, lively, nimble, sprightly, spry, yare, zippy
Related Word: animated, spirited, vivacious; flexible, graceful, supple
Contrasted words: inert, lumpish, torpid
Antonyms: inactive
3.
Synonyms: energetic 2, driving, enterprising, lively
Related Word: expeditious, prompt, ready
Contrasted words: disinterested, indifferent, unconcerned