Definition of expedition

• n. - The quality of being expedite; efficient promptness; haste; dispatch; speed; quickness; as to carry the mail with expedition.
• n. - A sending forth or setting forth the execution of some object of consequence; progress.
• n. - An important enterprise, implying a change of place; especially, a warlike enterprise; a march or a voyage with martial intentions; an excursion by a body of persons for a valuable end; as, a military, naval, exploring, or scientific expedition; also, the body of persons making such excursion.