Used other than figuratively or idiomatically: see see, back. / (colloquial euphemistic) To be rid of.

(idiomatic) No harm to one.

(chiefly Britain) Someone who has an anonymous support role in an organization, especially a technician or scientist; a boffin.

A room near the rear of a premises, especially one that is only accessible to a privileged few and can be used as an inconspicuous meeting place.

Of, relating to, or happening in a backroom. / (figuratively) Characterized by secrecy or anonymity.

A secondary road, a little-used road, a road through rural areas sometimes used as an alternative to main roads.

(idiomatic) To complete the greater part of (a project). / To overburden (a person).

Turning away from urban environs and attitudes, towards an organic, agrarian lifestyle.

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

Alternative form of back to back