(1):

(n.) The pole or other support on which fowls rest at night; a perch.

(2):

(n.) Roast.

(3):

(v. t.) See Roust, v. t.

(4):

(v. i.) To sit, rest, or sleep, as fowls on a pole, limb of a tree, etc.; to perch.

(5):

(v. i.) Fig.; To lodge; to rest; to sleep.

(6):

(n.) A collection of fowls roosting together.