1. a journey or voyage undertaken by a group of people with a particular purpose, especially that of exploration, research, or war
2. the group of people making such a journey
3. promptness or speed in doing or accomplishing something
Usage: formal

Examples

• The scientific expedition to Antarctica lasted six months.
• Lewis and Clark led a famous expedition to explore the western United States.
• The mountain climbing expedition faced severe weather conditions.
• Our expedition discovered three new species of insects.
• The rescue expedition searched for the missing hikers.
• She handled the urgent matter with great expedition.
• The expedition members packed supplies for the long journey.