Cheek of beef. See Illust. of Beef. -- Cheek bone (Anat.) the bone of the side of the face; esp., the malar bone. -- Cheek by jowl, side by side; very intimate. -- Cheek pouch (Zo÷l.), a sacklike dilation of the cheeks of certain monkeys and rodents, used for holding food. -- Cheeks of a block, the two sides of the shell of a tackle block. -- Cheeks of a mast, the projection on each side of a mast, upon which the trestletrees rest. -- Cheek tooth (Anat.), a hinder or molar tooth. -- Butment cheek. See under Butment.