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chal•leng•er



Pronunciation: (chal'in-jur), [key]
n.
1. a person or thing that challenges.
2. Boxing.a boxer who fights a champion for his championship title.
3. Radio.interrogator (def. 2).
4. (cap., 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.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

challengedchallenging
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