lacuna

1 a falling short of an essential or desirable amount or number <attributes many of the nation's problems to a lacuna of leadership at the top> Synonyms crunch, dearth, deficit, drought (also drouth), failure, famine, inadequacy, inadequateness, insufficiency, lack, deficiency, paucity, pinch, poverty, scantiness, scarceness, scarcity, shortage, undersupply, wantRelated Words absence, omission; meagerness, poorness, skimpiness; necessity, need, privationNear Antonyms bountifulness, copiousness; excess, overabundance, oversupply, surfeit, surplusAntonyms abundance, adequacy, amplitude, opulence, plenitude, plenty, sufficiency, wealth

2 an incomplete or deficient area <a lacuna in its collection of Impressionists that the museum is trying to fill> Synonyms hiatus, hole, gap, space, voidRelated Words defectiveness, detriment, disability, failing, fault, impairment, weakness; deficiency, deficit, imperfection, inadequacy, inadequateness, incompleteness, insufficience, insufficiency, lack, need, shortcoming, shortfall, wantNear Antonyms completeness, fullness