ret·ro·spect
[re-truh-spekt]
noun
1. contemplation of the past; a survey of past time, events, etc.
verb (used without object)
2. to look back in thought; refer back (often followed by to): to retrospect to a period in one’s youth.
verb (used with object)
3. to look back upon; contemplate retrospectively.
Idiom
4. in retrospect, in looking back on past events; upon reflection: It was, in retrospect, the happiest day of her life.