expedition
/ˌekspɪˈdɪʃən/noun
1
- a journey or voyage undertaken by a group of people with a particular purpose, especially that of exploration, scientific research, or war（为特定目的所作的）旅行, 出行（尤指探险、科学考察或远征）：
an expedition to the jungles of the Orinoco
对奥里诺科河丛林的探险
informal 〈非正式〉 a shopping expedition.
逛街购物。
1.1
- the people involved in such a journey or voyage踏上征途的人们; 远征队; 探险队; 考察队：
many of the expedition have passed rigorous courses.
考察队中的许多人经过了险峻的道路。
2
- mass noun formal promptness or speed in doing something〈正式〉迅速; 敏捷：
the landlord shall remedy the defects with all possible expedition.
房东必须尽快采取补救措施解决这些不足之处。
词源
late Middle English: via Old French from Latin expeditio（n-）, from expedire 'extricate' （see EXPEDITE）. Early senses included 'prompt supply of something' and 'setting out with aggressive intent'. The notions of 'speed' and 'purpose' are retained in current senses. Sense 1 dates from the late 16th cent.