IPA: //ˌpoʊstˈbɛləm//
KK: /ˈpoʊstˌbɛləm/
Relating to the time period after a war, particularly after the American Civil War.
The postbellum era saw significant changes in American society.
Postbellum → It is formed from "post-" (meaning after) and "bellum" (meaning war, from Latin). The term refers to the period after a war, specifically used in historical contexts such as the period following the American Civil War.
Think of 'post-' meaning after and 'bellum' meaning war — this helps you remember that postbellum refers to the time after a war.