(n.) A looking back on things past; view or contemplation of the past.

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