The Collaborative International Dictionary of English v.0.48:

Kilt \Kilt\,
   p. p. from Kill. [Obs.] --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Kilt \Kilt\, n. [OGael. cealt clothes, or rather perh. fr. Dan.
   kilte op to truss, tie up, tuck up.]
   A kind of short petticoat, reaching from the waist to the
   knees, worn in the Highlands of Scotland by men, and in the
   Lowlands by young boys; a filibeg. [Written also kelt.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Kilt \Kilt\, v. t. [imp. & p. p. Kilted; p. pr. & vb. n.
   Kilting.]
   To tuck up; to truss up, as the clothes. [Scot.] --Sir W.
   Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

kilt
    n 1: a knee-length pleated tartan skirt worn by men as part of
         the traditional dress in the Highlands of northern Scotland

The Devil's Dictionary (1881-1906):

KILT, n.  A costume sometimes worn by Scotchmen in America and
Americans in Scotland.