a minor or subsidiary street, esp. one leading off a main thoroughfare.

A street out of the main thoroughfare; a side street, lying out of the way, and hence less frequented.

A side street. Obsolete. rare.

With other nouns, chiefly with the sense ‘lying or leading off from the main trunk, body, or area’, as in off-branch, off-corner, off-drain, off flow…

A street crossing another, or running across between two main streets; a street at right angles to a main street.

Chiefly British. A minor, typically residential street used by drivers during peak periods to avoid congestion on main roads, or as a short cut.