back-to-back >> ˌbaktəˈbak
Definition: [adjective] (of houses) built in a continuous terrace backing on to another terrace, with a party wall or a narrow alley between.
Example: rows of back-to-back houses
Definition: [adjective] consecutive.
Example: his back-to-back victories in the Hungarian and Belgian Grands Prix
Definition: [noun] a house in a back-to-back terrace.
Example: a street of Victorian back-to-backs
Definition: [adverb] (of two people) facing in opposite directions with their backs touching.
Example: they sat on the ground, leaning back to back
Definition: [adverb] consecutively; in succession.
Example: the games were played back to back