American English

Definition of pin verb from the Oxford Advanced American Dictionary



    Verb Forms present simple I / you / we / they pin
    he / she / it pins
    past simple pinned
    -ing form pinning
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  1. 1pin something + adv./prep. to attach something onto another thing or fasten things together with a pin, etc. She pinned the ribbon onto her shirt. A message had been pinned to the noticeboard. Pin all the pieces of material together. She always wears her hair pinned back.
  2. prevent movement
  3. 2pin somebody/something + adv./prep. to make someone unable to move by holding them or pressing them against something They pinned him against a wall and stole his wallet. He grabbed her arms and pinned them to her sides. They found him pinned under the wreckage of the car.
  4. Idioms
    pin (all) your hopes on somebody/something, pin your faith on somebody/something
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    to rely on someone or something completely for success or help The company is pinning its hopes on the new project.
    Phrasal Verbspin somebodydownpin somebodydown (to something/doing something)pin somethingdownpin something on somebody
See the Oxford Advanced Learner's Dictionary entry: pin