Source : Webster's Revised Unabridged Dictionary (1913)

Noose \Noose\, n. [Prob. fr. OF. nous, nom. sing. or acc. pl. of
   nou knot, F. n?ud, L. nodus. Cf. {Node}.]
   A running knot, or loop, which binds the closer the more it
   is drawn.

Noose \Noose\, v. t. [imp. & p. p. {Noosed}; p. pr. & vb. n.
   {Noosing}.]
   To tie in a noose; to catch in a noose; to entrap; to
   insnare.

Source : WordNet®

noose
     n 1: a trap for birds or small mammals; often has a noose [syn: {snare},
           {gin}]
     2: a loop formed in a cord or rope by means of a slipknot; it
        binds tighter as the cord or rope is pulled [syn: {running
        noose}, {slip noose}]
     v 1: make a noose in or of
     2: secure with a noose