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WORDNET DICTIONARY

Noun stumper has 1 sense

• stumper(n = noun.communication) poser, sticker, toughie - a particularly difficult or baffling question or problem; Array
is a kind of problem
Derived form verb stump₁

CIDE DICTIONARY

OXFORD DICTIONARY

THESAURUS

stumper

Chinese puzzle, baffling problem, brain twister, campaigner, crossword puzzle, crux, electioneer, enigma, enigmatic question, floorer, jigsaw puzzle, knot, knotty point, mind-boggler, mystery, nut to crack, perplexed question, perplexity, poser, problem, puzzle, puzzlement, puzzler, question, question mark, sixty-four dollar question, sticker, stump orator, stump speaker, tough proposition, vexed question, whistle-stopper, why

For further exploring for "stumper" in Webster Dictionary Online