GNU Collaborative International Dictionary of English

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1.       
   Pin (?), v. t. [imp. & p. p. Pinned (?); p. pr. & vb. n. Pinning.] [See Pin, n.] To fasten with, or as with, a pin; to join; as, “to pin a garment; to pin boards together.” “As if she would pin her to her heart.”  Shak.
   
   [1913 Webster]
   
   To pin one's faith upon, to depend upon; to trust to.
   
   [1913 Webster]