The Collaborative International Dictionary of English v.0.48:

Inanimate \In*an"i*mate\, v. t. [Pref. in- in (or intensively) +
   animate.]
   To animate. [Obs.] --Donne.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Inanimate \In*an"i*mate\, a. [L. inanimatus; pref. in- not +
   animatus animate.]
   Not animate; destitute of life or spirit; lifeless; dead;
   inactive; dull; as, stones and earth are inanimate
   substances.
   [1913 Webster]

         Grieving, if aught inanimate e'er grieves. --Byron.

   Syn: Lifeless; dead; inert; inactive; dull; soulless;
        spiritless. See Lifeless.
        [1913 Webster]

WordNet (r) 3.0 (2006):

inanimate
    adj 1: belonging to the class of nouns denoting nonliving
           things; "the word `car' is inanimate" [ant: animate]
    2: not endowed with life; "the inorganic world is inanimate";
       "inanimate objects" [syn: inanimate, nonliving, non-
       living] [ant: animate]
    3: appearing dead; not breathing or having no perceptible pulse;
       "an inanimate body"; "pulseless and dead" [syn: breathless,
       inanimate, pulseless]

Moby Thesaurus II by Grady Ward, 1.0:

116 Moby Thesaurus words for "inanimate":
   abiotic, animate, apathetic, asleep, asleep in Jesus, at rest,
   azoic, benumbed, bereft of life, blase, bored, breathless,
   called home, carrion, cold, common gender, croaked, dead,
   dead and gone, death-struck, debilitated, deceased, defunct,
   demised, departed, departed this life, destitute of life, done for,
   dopey, dormant, droopy, drugged, dull, dumb, enervated, exanimate,
   extinct, fallen, feminine, finished, food for worms, gender, gone,
   gone to glory, gone west, heavy, hebetudinous, immobile, inactive,
   inanimated, inert, insensate, insensible, insentient, jaded,
   lackadaisical, languid, languorous, late, late lamented,
   launched into eternity, leaden, lethargic, lifeless, listless,
   lumpish, martyred, masculine, moribund, motionless, mute, neuter,
   no more, nonconscious, nonliving, numb, passed on, phlegmatic,
   pooped, pushing up daisies, released, reposing, resting easy,
   sainted, sated, senseless, sleeping, sleepy, slow, sluggish,
   smitten with death, somnolent, soulless, spiritless, stagnant,
   stagnating, still, stillborn, stultified, supine, taken away,
   taken off, torpid, unanimated, unconscious, unfeeling, unmoving,
   vegetable, vegetative, wan, weary, with the Lord, with the saints,
   without life, without vital functions, world-weary