The Collaborative International Dictionary of English v.0.48:

Foin \Foin\ (foin), n. [F. fouine a marten.]
   1. (Zool.) The beech marten (Mustela foina). See Marten.
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   2. A kind of fur, black at the top on a whitish ground, taken
      from the ferret or weasel of the same name.[Obs.]
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            He came to the stake in a fair black gown furred and
            faced with foins.                     --Fuller.
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The Collaborative International Dictionary of English v.0.48:

Foin \Foin\, v. i. [OE. foinen, foignen; of uncertain origin;
   cf. dial. F. fouiner to push for eels with a spear, fr. F.
   fouine an eelspear, perh. fr. L. fodere to dig, thrust.]
   To thrust with a sword or spear; to lunge. [Obs.]
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         He stroke, he soused, he foynd, he hewed, he lashed.
                                                  --Spenser.
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         They lash, they foin, they pass, they strive to bore
         Their corselets, and the thinnest parts explore.
                                                  --Dryden.
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The Collaborative International Dictionary of English v.0.48:

Foin \Foin\, v. t.
   To prick; to st?ng. [Obs.] --Huloet.
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The Collaborative International Dictionary of English v.0.48:

Foin \Foin\, n.
   A pass in fencing; a lunge. [Obs.] --Shak.
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