Meaning

noun approaching a particular destination; a coming closer; a narrowing of a gap

noun a rule for limiting or ending debate in a deliberative body

noun a Gestalt principle of organization holding that there is an innate tendency to perceive incomplete objects as complete and to close or fill gaps and to perceive asymmetric stimuli as symmetric

originFrom Middle English closure, from Old French closure, from Late Latin clausura, from Latin claudere (“to close”); see clausure and cloture (etymological doublets) and close.

Etymology from Wiktionary, CC BY-SA 3.0