Webster's Revised Unabridged Dictionary · 1913

Roost

Roost , noun

Roast. [Obsolete] — Chaucer

Roost , transitive verb

See Roust, transitive verb

Roost , noun

[Anglo-Saxon hrōst; akin to OD. roest roost, roesten to roost, and probably to English roof. Compare Roof.]

1.
The pole or other support on which fowls rest at night; a perch.
He clapped his wings upon his roost. — Dryden
2.
A collection of fowls roosting together.
Collocations (1)
At roost , on a perch or roost; hence, retired to rest.

Roost , intransitive verb

1.
To sit, rest, or sleep, as fowls on a pole, limb of a tree, etc.; to perch. — Wordsworth
2.
Figuratively; To lodge; to rest; to sleep.
O, let me where thy roof my soul hath hid, O, let me roost and nestle there. — Herbert