Webster's Revised Unabridged Dictionary · 1913

Retrospective

Retrospective , adjective

[Compare French rétrospectif.]

1.
Looking backward; contemplating things past; -- opposed to prospective; as, a retrospective view.
The sage, with retrospective eye. — Pope
2.
Having reference to what is past; affecting things past; retroactive; as, a retrospective law.
Inflicting death by a retrospective enactment. — Macaulay