Expedition/ˌekspəˈdɪʃn/ Definition 1 of 3Pro Tip 1/3Purposeful Journey An expedition has a clear goal, like exploration or research, not just sightseeing. They embarked on a jungle expedition to discover new species. Pro Tip 2/3Planned Adventure Expeditions are usually well-planned, not spontaneous trips. Months of training preceded their Everest expedition. Pro Tip 3/3Beyond Tourism An expedition is more adventurous and challenging than a regular tourist trip. Their Arctic expedition took them across treacherous ice fields.