say it: uh-SUR-shuhn
assertion is a noun meaning "a declaration that is made emphatically (as if no supporting evidence were necessary)". It carries 2 recorded senses.
a declaration that is made emphatically (as if no supporting evidence were necessary)
the act of affirming or asserting or stating something
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 assertion 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.