Meaning

noun an army unit large enough to sustain combat

noun one of the portions into which something is regarded as divided and which together constitute a whole

noun the act or process of dividing

originPIE word *dwóh₁ From Middle English divisioun, from Old French division, from Latin dīvīsiō, dīvīsiōnem, noun of process form from perfect passive participle dīvīsus (“divided”), from dīvidō (“divide”). Doublet of divisio.

Etymology from Wiktionary, CC BY-SA 3.0