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.
To pin one's faith upon, to depend upon; to trust to.