to chirm (as birds) around.

transitive. Of a bird: to produce (a note or song) by chirruping or warbling; to express or communicate (something) in this way.

transitive (also with out).

transitive.

to chirp about.

transitive. To utter by chirping.

transitive with cognate object.

transitive. Of a bird: to sing (its song) alongside other birds, such that the songs intermingle in a playful or lively manner. Obsolete. rare.

transitive. Of a bird: to communicate (something) with a brief high-pitched sound or call, or a series of such sounds. Also in extended use…

transitive. To utter by warbling, warble.