Search Result for "fourth dimension":
Wordnet 3.0

NOUN (1)

1. the fourth coordinate that is required (along with three spatial dimensions) to specify a physical event;
[syn: fourth dimension, time]



WordNet (r) 3.0 (2006):

fourth dimension
    n 1: the fourth coordinate that is required (along with three
         spatial dimensions) to specify a physical event [syn:
         fourth dimension, time]