early 15c., "division into shares, distinction," from Old French particion (12c.), from Latin partitionem (nominative partitio) "a sharing, division, partition, distribution; method of dividing," from past participle stem of partire "to part, divide" (from pars "a part, piece, a share," from PIE root *pere-(2) "to grant, allot"). Sense of "that which separates" first recorded late 15c.
1741, from partition (n.). Related: Partitioned; partitioning.
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