adjective
1. obsolete : having a limit or termination
2. : provided with a date
dated and stamped documents
3.
a. : spoiled or made invalid or useless by subsequent events or phenomena : obsolete
houses burn down, roads are changed, new bridges are built, and a map soon becomes dated — Infantry Journal
b. : marked by often hackneyed features, materials, or techniques associated with the immediate and usually discounted past
a dated novelist
dated jazz music
I find her conclusions dated . She smacks too much of feminism and the selfish twenties — Rhona R. Wilber