(transitive) To tighten or secure with screws. / (transitive) To raise (rent, fees, etc.) to extortionate levels. / (transitive) To raise or summon up. / (transitive) To twist into a contorted state.

A screw whose head has a hexagonal socket.

(transitive, slang) To cheat someone, or ruin their chances in a game or other situation.

(engineering) A screw for adjusting the distance between the stones in a grinding mill by raising or lowering the bridgetree.

(US) A fixing that allows screws to be fitted into masonry walls; called a wall plug in UK English.

A standard screw thread allowing a light bulb to be screwed into its socket.

(slang, intransitive) To make out or engage in sexual activity, usually without actually having sex. / (slang, intransitive) To waste time; to dawdle; to play or idle.

(slang) A state of insanity or eccentricity. / (slang, archaic) A state of enmity or disagreement.

(military) A steel stake, used for barbed-wire defences, the lower half of which is corkscrew shaped, to enable it to be screwed into the ground.

plural of screw picket