say it: fed-ur-AY-shuhn
federation is a noun meaning "an organization formed by merging several groups or parties". It carries 3 recorded senses.
an organization formed by merging several groups or parties
a union of political organizations
the act of constituting a political unity out of a number of separate states or colonies or provinces so that each member retains the management of its internal affairs
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 federation 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.