The Collaborative International Dictionary of English v.0.48:

Knot \Knot\, v. t. [imp. & p. p. Knotted; p. pr. & vb. n.
   Knotting.]
   1. To tie in or with, or form into, a knot or knots; to form
      a knot on, as a rope; to entangle. "Knotted curls."
      --Drayton.
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            As tight as I could knot the noose.   --Tennyson.
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   2. To unite closely; to knit together. --Bacon.
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   3. To entangle or perplex; to puzzle. [Obs. or R.]
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The Collaborative International Dictionary of English v.0.48:

Knotted \Knot"ted\, a.
   1. Full of knots; having knots; knurled; as, a knotted cord;
      the knotted oak. --Dryden.
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   2. Interwoven; matted; entangled.
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            Make . . . thy knotted and combined locks to part.
                                                  --Shak.
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   3. Having intersecting lines or figures.
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            The west corner of thy curious knotted garden.
                                                  --Shak.
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   4. (Geol.) Characterized by small, detached points, chiefly
      composed of mica, less decomposable than the mass of the
      rock, and forming knots in relief on the weathered
      surface; as, knotted rocks. --Percival.
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   5. Entangled; puzzling; knotty. [R.]
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            They're catched in knotted lawlike nets. --Hudibras.
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WordNet (r) 3.0 (2006):

knotted
    adj 1: tied with a knot; "his carefully knotted necktie"
    2: used of old persons or old trees; covered with knobs or
       knots; "gnarled and knotted hands"; "a knobbed stick" [syn:
       gnarled, gnarly, knotted, knotty, knobbed]