challenger

[ chal-in-jer ]
/ ˈtʃæl ɪn dʒər /

noun

a person or thing that challenges.
Boxing. a boxer who fights a champion for his championship title.
(initial capital letter, italics) U.S. Aerospace. the second space shuttle to orbit and return to earth: exploded 1½ min. after launch on Jan. 28, 1986, causing the death of all seven on board.

Origin of challenger

Middle English word dating back to 1250–1300; see origin at challenge, -er1

Related forms

non·chal·leng·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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