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nonplus Line breaks: non|plus
Pronunciation: /nɒnˈplʌs/

Definition of nonplus in English:

verb (nonplusses, nonplussing, nonplussed)

[with object]
Surprise and confuse (someone) so much that they are unsure how to react: Diane was nonplussed by such an odd question
More example sentences
  • No doubt middle class people will be nonplussed by my compliance with the doctor's wishes.
  • The boys are nonplussed by his invasion into their lives, to say the least.
  • Alex walked out slowly, nonplussed by the lack of surprise at his arrival.
surprise, stun, dumbfound, confound, astound, astonish, amaze, take aback, disconcert, stop someone in their tracks, throw, throw/catch off balance;
informal faze, flummox, floor, flabbergast, discombobulate, stump, bamboozle, fox


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A state of being very surprised and confused: reduced to a perfect nonplus, he rose from his chair


Late 16th century: from Latin non plus 'not more'. The noun originally meant 'a state in which no more can be said or done'.

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