From Middle English superfluous, from Latin superfluus (“superfluous”), from superfluō (“overflow”), from super (“above, more than, over”) + fluō (“flow”). Compare mellifluous and fluid, also from Latin. Literally corresponds to overflow, which is from Germanic, rather than Latin.
- (Received Pronunciation) IPA(key): /suːˈpɜːflu.əs/, /sjʊˈpɜːflu.əs/
- (US) IPA(key): /suːˈpɝːflu.əs/
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- In excess of what is required or sufficient.
- With a full rain suit, carrying an umbrella may be superfluous.