Find the word definition

Longman Dictionary of Contemporary English
double-header
noun
EXAMPLES FROM CORPUS
▪ Lancashire's only representatives in the cup final double-header are Waterhead of Oldham.
▪ There, Richardson usually entered the first game of the Friday night double-header in the second inning.
Douglas Harper's Etymology Dictionary
double-header

1869, American English, originally a kind of fireworks or a railway train pulled by two engines; see double (adj.) + head (n.). Baseball sense is c.1890.

Wiktionary
double-header

alt. 1 (context sports English) A pair of games played one after another between the same teams. 2 A pair of top rank events after another, at one venue. 3 (context fishing English) The catching of a single fish simultaneously by two fishermen when fishing together. 4 (context rail English) A train pulled by two locomotives. n. 1 (context sports English) A pair of games played one after another between the same teams. 2 A pair of top rank events after another, at one venue. 3 (context fishing English) The catching of a single fish simultaneously by two fishermen when fishing together. 4 (context rail English) A train pulled by two locomotives.

Usage examples of "double-header".

Imperials, one or two oddities like an unbroken pair or a double-header, the occasional cheap packet of mixed pins on approval .