say it: ab-NAWR-muhl
abnormal is an adjective meaning "not normal; not typical or usual or regular or conforming to a norm". It carries 3 recorded senses.
departing from the normal in e.g. intelligence and development
“they were heartbroken when they learned their child was abnormal”
“an abnormal personality”
psychology
Definitions, synonyms and semantic relations for abnormal 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.