Wordnet 3.0
NOUN (1)
1. 
 (trademark) a child's plastic construction set for making mechanical models; 
[syn: Lego, Lego set]
WordNet (r) 3.0 (2006):
Lego
    n 1: (trademark) a child's plastic construction set for making
         mechanical models [syn: Lego, Lego set]