Home › Words › L › lacunelacune/ləˈk(j)uːn/lacune · noun — A lacunar stroke or infarct.Definition from Wiktionary (CC BY-SA 3.0).lacune is pronounced /ləˈk(j)uːn/.EtymologyFrom French lacune. Doublet of lacuna and lagoon.nounA lacunar stroke or infarct.A lacuna.e.g.“Let us climb over the ice and snow, leap across the lacune, and wipe away the stiria” — 1824, Walter Savage Landor, Imaginary Conversations of Literary Men and Statesmen, volume I, London: […] Taylor and Hessey, […], →OCLC:Definitions & examples from Wiktionary (CC BY-SA 3.0).