pajama

from WordNet (r) 3.0 (2006)

pajama
    n 1: a pair of loose trousers tied by a drawstring around the
         waist; worn by men and women in some Asian countries [syn:
         {pajama}, {pyjama}]
    2: (usually plural) loose-fitting nightclothes worn for sleeping
       or lounging; have a jacket top and trousers [syn: {pajama},
       {pyjama}, {pj's}, {jammies}]

from The Collaborative International Dictionary of English v.0.48

Pyjama \Py*ja"ma\, n. [Hind. p[=a]e-j[=a]ma, literally, leg
   clothing.]
   In India and Persia, thin loose trowsers or drawers; in
   Europe and America, drawers worn at night, or a kind of
   nightdress with legs. Usually used in the plural. See
   {pajamas}. [Written also {paijama} {pajama}.] [Chiefly
   British variant of {pajama}.]
   [1913 Webster +PJC] Pyjamas