(idiomatic) sequential or consecutive, in the case of exactly three events.

Alternative form of back to back

Alternative form of back-to-back

sequential or consecutive. / With one's back facing that of somebody else. / (physics, by extension) emerging in exactly opposite directions / (of a house) Having a party wall at the rear

A house with a party wall at the rear.

With one's back facing that of somebody else. / Consecutively; one after the other. / (poker slang) Synonym of wired (“being a pair in seven card stud with one face up and one face down”)

plural of back-to-back

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

(baseball) Two home runs hit by consecutive batters

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