Meaning

noun a shelter with perches for fowl or other birds

noun a perch on which domestic fowl rest or sleep

verb sit, as on a branch

originFrom Middle English roste (“chicken's roost; perch”), from Old English hrōst (“wooden framework of a roof; roost”), from Proto-West Germanic *hrōst, from Proto-Germanic *hrōstaz (“wooden framework; grill”); see *raustijan. Cognate with Dutch roest (“roost”), German Low German Rust (“roost”), German Rost (“grate; gridiron; grill”).

Etymology from Wiktionary, CC BY-SA 3.0