from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun One considered to have the dominant position or highest authority, especially as a result of a competitive victory.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun idiomatic the boss, the leader (of the pack)
  • noun idiomatic in a competition, the one expected to win

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a person who is in charge


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