say it: uh-PAWR-shuhn-muhnt
apportionment is a noun meaning "the act of distributing by allotting or apportioning; distribution according to a plan". It carries one recorded sense.
the act of distributing by allotting or apportioning; distribution according to a plan
“the apportionment of seats in the House of Representatives is based on the relative population of each state”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for apportionment come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.