adjective

unusual; not typical. "late claims will only be accepted in exceptional circumstances" синонимы: unusual, uncommon, abnormal, atypical, extraordinary, out of the ordinary, out of the way, rare, singular, unprecedented, unexpected, surprising, strange, odd, bizarre, freakish, anomalous, peculiar, inconsistent, deviant, divergent, aberrant, unheard of, out of the common, weird, way out, freaky, something else, seldom, unexampled

noun

an item in a company's accounts arising from its normal activity but much larger or smaller than usual.