say it: ik-SEP-shuhn
exception is a noun meaning "a deliberate act of omission". It carries 3 recorded senses.
an instance that does not conform to a rule or generalization
“all her children were brilliant; the only exception was her last child”
“an exception tests the rule”
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 exception 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.