back–to–back

1 back–to–back adjective
1 back–to–back
adjective
Britannica Dictionary definition of BACK–TO–BACK
1 
: facing in opposite directions and often touching at the back
2 
: coming one after another in time — see also back to back at 1back

— back to back

adverb
2 back–to–back noun
plural back–to–backs
2 back–to–back
noun
plural back–to–backs
Britannica Dictionary definition of BACK–TO–BACK
[count] British
: a house that is connected in a row with other houses on each side and with a similar row of houses behind it