Pronunciation: (am-bish'us), [key]
1. having ambition; eagerly desirous of achieving or obtaining success, power, wealth, a specific goal, etc.: ambitious students.
2. showing or caused by ambition: an ambitious attempt to break the record.
3. strongly desirous; eager: ambitious of love and approval.
4. requiring exceptional effort, ability, etc.: an ambitious program for eliminating all slums.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.