- lack, deficiency, want - the state of needing something that is absent or unavailable; "there is a serious lack of insight into the problem"; "water is the critical deficiency in desert regions"; "for want of a nail the shoe was lost"
--1 is a kind of need, demand
--1 has particulars:absence; dearth, famine, shortage; mineral deficiency; stringency, tightness - insufficiency, inadequacy, deficiency - lack of an adequate quantity or number; "the inadequacy of unemployment benefits"
--2 is a kind of amount
--2 has particulars:meagerness, meagreness, poorness, scantiness, scantness, exiguity; deficit, shortage, shortfall; scarcity, scarceness