~ 1
■ noun a gregarious crow with black plumage and a bare face, nesting in colonies in treetops. [ Corvus frugilegus .]
■ verb informal defraud, swindle, or overcharge.
Origin
OE hrōc , prob. imitative and of Gmc origin.
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~ 2
■ noun a chess piece, typically with its top in the shape of a battlement, that can move in any direction along a rank or file on which it stands.
Origin
ME: from OFr. rock , based on Arab. ruḵḵ (of which the sense remains uncertain).