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Adjective: ambitious  am'bi-shus
  1. Having a strong desire for success or achievement
    "The Group of Eight rich nations will likely agree to an ambitious target for cutting greenhouse costs";
    - aspirational
  2. Requiring full use of your abilities or resources
    "ambitious schedule";
    - challenging

See also: ambition, ambitiousness, aspirant, aspiring, compulsive, determined, difficult, driven, enterprising, go-getting [informal], hard, manqué, overambitious, pushful, pushy, wishful, would-be

Antonym: unambitious

Encyclopedia: Ambitious