abnormal
adj.adj. different from what is usual or expected, especially in a way that is worrying or harmful. You use this to describe things that do not follow the normal pattern.
adj. deviating from what is standard, normal, or expected, typically in a way that is undesirable or worrying. Often used in medical, statistical, or psychological contexts to describe outliers.
The doctor said the test results were abnormal.
The city experienced abnormal rainfall this month, leading to unexpected flooding in the downtown area.
While minor variations in heart rate are common, these abnormal readings suggest an underlying condition that requires further investigation by a specialist.
From ab- + normal. First attested in 1835, replacing the earlier anormal and even earlier abnormous, from Latin abnormis (“departing from normal”), from either ab- (“away from”) + norma (“rule, norm”), or Ancient Greek ἀνώμαλος (anṓmalos).
Often used as an attributive adjective before a noun, but can also follow linking verbs like 'be', 'seem', or 'appear'.