The Collaborative International Dictionary of English v.0.48:

Elapse \E*lapse"\, v. i. [imp. & p. p. Elapsed; p. pr. & vb.
   n. Elapsing.] [L. elapsus, p. p. of elabi to glide away; e
   out + labi to fall, slide. See Lapse.]
   To slip or glide away; to pass away silently, as time; --
   used chiefly in reference to time.
   [1913 Webster]

         Eight days elapsed; at length a pilgrim came. --Hoole.
   [1913 Webster]

WordNet (r) 3.0 (2006):

elapsed
    adj 1: (of time) having passed or slipped by; "elapsed time"

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "elapsed":
   ago, antiquated, antique, blown over, by, bygone, bypast, dated,
   dead, dead and buried, deceased, defunct, departed, expired,
   extinct, finished, forgotten, gone, gone glimmering, gone-by,
   has-been, irrecoverable, lapsed, no more, obsolete, over, passe,
   passed, passed away, past, run out, vanished, wound up