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1. adjective Consecutive and in quick succession; one after another. The team secured back-to-back victories this afternoon, thanks to their fantastic goalkeeper.
2. adjective Of houses, built so that the back gardens or terraces of two houses are conjoined and then bisected by a partitioning wall or small alley. Primarily heard in UK. We were worried that our new back-to-back house wouldn't offer as much privacy, but our terrace is completely our own.
3. adverb Done or occurring consecutively and in quick succession. They're going to show the two films back-to-back this afternoon.
4. noun A house with back-to-back gardens or terraces. Primarily heard in UK. The new housing estate is going to be made up entirely of back-to-backs.
1. Lit. adjacent and touching backs. They started the duel by standing back-to-back. Two people who stand back-to-back can manage to see in all directions.
2. Fig. following immediately. (Actually such things are front to back, with the "end" of one event followed in time by the beginning of another.) The doctor had appointments set up back-to-back all day long. I have three lecture courses back-to-back every day of the week.
back to back
1. With backs close together or touching, as in In the first and second rows of the bus, the seats were back to back, an unusual arrangement. This term also can be applied to persons who stand facing in opposite directions and with their backs touching. [Mid-1800s]
2. Consecutively, one after another, as in I'm exhausted; I had three meetings back to back. [Mid-1900s]
ˌback to ˈback
1 if two people stand back to back, they stand with their backs facing or touching each other
2 if two or more things happen back to back, they happen one after the other: back-to-back victories/successes
back to back
Consecutively and without interruption: presented three speeches back to back.