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Definition of inactive:

  1. Not active; having no power to move; that does not or can not produce results; inert; as, matter is, of itself, inactive.
  2. Not active; inert; esp., not exhibiting any action or activity on polarized light; optically neutral; -- said of isomeric forms of certain substances, in distinction from other forms which are optically active; as, racemic acid is an inactive tartaric acid.
  3. Not disposed to action or effort; not diligent or industrious; not busy; idle; as, an inactive officer.


delayed, closed, strikebound, reserve, soundless, dark, off-duty, dull, arrested, dead, lazy, still, in abeyance, action, underactive, torpid, slow, off, in remission, electrostatic, passive, abeyant, suspended, unresisting, noneffervescent, resistless, peaceful, inert, unused, static, vacant, sedentary, retired, at rest, hypoactive, unmoving, unchanging, nonoperational, latent, unreactive, inoperative, hibernating, silent, supine, idle, trifling, used, nonmoving, motionless, stable, unruffled, sluggish, quiescent, smooth, on leave, show, indolent, dormant, slothful.

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