Definition of hiatuses:
(n) :
An interruption, break, pause or absence.
(n) :
An temporary break from work, especially one which is unexpected.
(n) :
A gap in a series, making it incomplete.
(n) :
(prosody, phonetics, sometimes uncountable) A syllable break between two vowels, without an intervening consonant.
(n) :
(anatomy) An opening in an organ.
(n) :
(geology) A gap in geological strata.