ଅର୍ଥ : Orchestral music played at the beginning of an opera or oratorio.
ଅର୍ଥ : Something that serves as a preceding event or introduces what follows.
ଉଦାହରଣ :
Training is a necessary preliminary to employment.
Drinks were the overture to dinner.
ସମକକ୍ଷ : preliminary, prelude