How To CAST Android Phone to LG TV using SCREEN SHAREA curved or sharply bent device, usually of metal, used to catch, drag, suspend, or fasten something else. Something shaped like a hook, especially: a. A curved or barbed plant or animal part. A sharp bend or curve, as in a river. Slang a. A means of attracting interest or attention; an enticement: a sales hook. Music A catchy motif or refrain: "sugary hard rock melodies [and] ear candy hooks" Boston Globe.