Meaning of challenger

chal•leng•er

Pronunciation: (chal'in-jur), [key]
— n.
  1. a person or thing that challenges.
  2. a boxer who fights a champion for his championship title.
  3. interrogator (def. 2).
  4. (cap., italics)the second space shuttle to orbit and return to earth: exploded 1 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.
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