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: not customary or usual : unusual, atypical
uncustomary behavior … the nurse returned in a state of most uncustomary excitement …— Wilkie Collins
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aberrant, aberrated, abnormal, anomalous, atypical, especial, exceeding, exceptional, extraordinaire, extraordinary, freak, odd, peculiar, phenomenal, preternatural, rare, singular, uncommon, unique, unusual, unwonted
common, customary, normal, ordinary, typical, unexceptional, unextraordinary, usual
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1650, in the meaning defined above
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by force of circumstances
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