Search Result for "gravitational collapse":
Wordnet 3.0

NOUN (1)

1. the implosion of a star resulting from its own gravity; the result is a smaller and denser celestial object; 



WordNet (r) 3.0 (2006):

gravitational collapse
    n 1: the implosion of a star resulting from its own gravity; the
         result is a smaller and denser celestial object