The Collaborative International Dictionary of English v.0.48:

Retrospect \Re"tro*spect\, v. i. [L. retrospicere; retro back +
   specere, spectum, to look. See Spy, and cf. Expect.]
   To look backward; hence, to affect or concern what is past.
   [1913 Webster]

         It may be useful to retrospect to an early period. --A.
                                                  Hamilton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Retrospect \Re"tro*spect\, n.
   A looking back on things past; view or contemplation of the
   past. --Cowper.
   [1913 Webster]

         We may introduce a song without retrospect to the old
         comedy.                                  --Landor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

retrospect
    n 1: contemplation of things past; "in retrospect"
    v 1: look back upon (a period of time, sequence of events);
         remember; "she reviewed her achievements with pride" [syn:
         review, look back, retrospect]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "retrospect":
   afterthought, bring back, bring to mind, call back, call to mind,
   call up, cite, commitment to memory, conjure up, evoke,
   exercise of memory, flashback, go back, go back over, hark back,
   hindsight, learning by heart, look back, looking back, memoir,
   memorization, memorizing, mind, recall, recall to mind, recalling,
   recapture, recollect, recollecting, recollection, reconsideration,
   reevoke, reflect, reflection, remember, remembering, remembrance,
   remind, reminisce, reminiscence, retain, retrace, retrospection,
   review, review in retrospect, revision, revive, rote, rote memory,
   see in retrospect, study, summon up, think back, think of,
   use hindsight