In unison, agreement, or harmony. Obsolete.

With after, at. In accordance or agreement with. Obsolete.

figurative. In agreement or harmony; together, at the same time. Frequently with with.

of a piece: (a) consisting of a single part, mass, or body; (b) of one and the same kind or quality; uniform, consistent, in accordance.

Acting jointly (with another); with joint action or purpose; with one accord; together.

in consort: in accord; in concert (with which it finally blends). Obsolete.

figurative in in tone, ‘in tune’, in harmony or accordance; also, in good condition (quot. 1513); out of tone, out of order, in a state of…

at unison (formerly also †at unisons) = in unison at phrases 1. Now rare.

of a piece with: in accordance with; consistent or commensurate with.

With to. Consistent or exactly agreeing with; mindful or observant of; accurately representing. Now chiefly in true to nature, true to life, true to…

In agreement or harmony with; consistent with. Cf. of a suit with at phrases 1f.

in harmony: in agreement or accordance, consistent, congruous. So out of harmony.

of a suit with: of a piece with; of the same quality or character as. Cf. phrases 1b(c). Obsolete.

figurative in in tune, out of tune, in or out of order or proper condition; in or out of harmony with some person or thing; (also) of a motor car…

in key: in tune, with accurate pitch; (figurative) in harmony or agreement (with something else).

tuned in (figurative): (a) in rapport with, in harmony with; const. to, on; (b) (slang) = switched-on at switched, adj. 3b.

Consisting of or made from a single piece; uniform, consistent.