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PIN definition: a small, slender, often pointed piece of wood, metal, etc., used to fasten, support, or attach things. See examples of pin used in a sentence.

Definition of pin noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

PIN meaning: 1. a small thin piece of metal with a point at one end, especially used for temporarily holding…. Learn more.

Define pin. pin synonyms, pin pronunciation, pin translation, English dictionary definition of pin. abbr. personal identification number n. 1. a. A short, straight, stiff piece of wire with a blunt head and a …

Dec 18, 2025 · pin (plural pins) A needle without an eye (usually) made of drawn-out steel wire with one end sharpened and the other flattened or rounded into a head, used for fastening. quotations

Someone's PIN or PIN number is a secret number which they can use, for example, with a bank card to withdraw money from a cash machine or ATM. PIN is an abbreviation for 'personal identification …