Hiatus

n.	1.	An opening; an aperture; a gap; a chasm; esp., a defect in a manuscript, where some part is lost or effaced; a space where something is wanting; a break.
	2.	(Gram.) The concurrence of two vowels in two successive words or syllables.

Noun	1.	hiatus - an interruption in the intensity or amount of something Synonyms: abatement, reprieve, respite, suspension
	2.	hiatus - a missing piece (as a gap in a manuscript)
	3.	hiatus - a natural opening or perforation through a bone or a membranous structure Synonyms: foramen

aperture, arrearage, breach, break, broaching, caesura, cavity, cessation, chasm, check, clearance, clearing, cleft, crack, defalcation, defect, deficiency, deficit, disclosure, discontinuity, distance between, double space, em space, en space, fenestra, fissure, fistula, fontanel, foramen, freeboard, gap, gape, gat, gulf, hair space, half space, hole, hollow, inlet, interim, intermediate space, intermission, interruption, interspace, interstice, interval, jump, lack, lacuna, laying open, leak, leap, leeway, letup, lull, margin, missing link, need, omission, opening, opening up, orifice, outage, outlet, passageway, pause, pore, room, shortage, single space, slot, space, space between, split, stoma, suspension, throwing open, time interval, ullage, uncorking, unstopping, want, wantage, yawn