(baseball) Two home runs hit by consecutive batters

(telecommunications) The direct connection of the output of one telecommunications device to the input of another.

(travel, UK, Ireland) Any of a series of airline tickets, issued with overlapping travel dates, used to circumvent airfare minimum stay requirements.

plural of back to back jack

plural of back-to-back connection

plural of back to back ticket

A surname. / A hamlet in St Clears community, Carmarthenshire, Wales (OS grid ref SN2515). / A locality in Jämtland, Sweden.

plural of back / (Cambridge University, with "the") The backyard of the University.

Third-person singular simple present indicative form of back

plural of backing