abbr. Personal identification number (for use with a cashcard etc.).

- —n. - small thin pointed piece of metal with a round or flattened head used (esp. In sewing) for holding things in place, attaching one thing to another, etc.

- peg of wood or metal for various purposes.

- (in idioms) something of small value (not worth a pin).

- (in pl.) Colloq. Legs. —v. (-nn-) 1 a (often foll. By to, up, together) fasten with a pin or pins. B transfix with a pin, lance, etc.

- (usu. Foll. By on) put (blame, responsibility, etc.) On (a person etc.).

- (often foll. By against, on, etc.) Seize and hold fast. pin down 1 (often foll. By to) bind (a person etc.) To a promise, arrangement, etc.

- force (a person) to declare his or her intentions.

- restrict the actions of (an enemy etc.).

- specify (a thing) precisely. Pin one's faith (or hopes etc.) On rely implicitly on. [latin pinna point etc.]