Definition from Wiktionary, the free dictionary
See also: double-header
doubleheader (plural doubleheaders)
- A train with two engines (predates baseball term).
- (sports) Two games played on the same day at the same venue.
- (fishing) Two fishermen each catching a fish at the same time.
train with two engines
two games played on the same day between the same teams
two fishermen each catching a fish at the same time