WordNet sense 1 (the interval between two times):

distance

WordNet sense 2 (a blank character used to separate successive words in writing or printing):

blank

WordNet sense 3 (a blank area):

place, blank space

WordNet sense 4 ((printing) a block of type without a raised letter; used for spacing between words):

quad

WordNet sense 5 (the unlimited expanse in which everything is located):

infinite