Home › Words › H › hyperdilationhyperdilationhyperdilation means excessive dilation.EtymologyFrom hyper- + dilation.nounExcessive dilationDefinitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.overdilation 86% match — excessive dilation vs hyperdilation →hyperexpansion 77% match — excessive expansion vs hyperdilation →underdilation 71% match — Less than normal dilation vs hyperdilation →overdistention 70% match — excessive distention vs hyperdilation →overinhalation 66% match — Excessive inhalation vs hyperdilation →arteriodilation 63% match — Arterial dilation: dilation of an artery or arteries. vs hyperdilation →hyperconstrict 63% match — To constrict excessively vs hyperdilation →dilational 62% match — Involving dilation (or compression) vs hyperdilation →