IPA: /ˈdʌbəlˌhɛdə/
KK: /ˈdʌbəlˌhɛdər/
A term used to describe two games or events that are played back-to-back on the same day, often in sports.
The baseball team played a doubleheader on Saturday, winning both games.
Doubleheader → It is formed from "double" (from Old French *doble*, meaning twofold or twice) and "header" (from Old English *heafod*, meaning head). The word "doubleheader" refers to two events or games held back-to-back, hence two heads or instances.
Think of 'double' meaning two and 'header' referring to the main event — a doubleheader is like having two main events in a row.