Longman Dictionary of Contemporary English - expedition

~ n 1 a long journey, especially one made by a group of people, to a place that is dangerous or that has not been visited before  (Brown led an expedition to the top of Kilimanjaro.) 2 the group of people that make this journey  (He was the youngest member of the British Everest expedition in 1974.) 3 often humorous a short journey, usually made for a particular purpose  (a shopping expedition)  (a shopping expedition to the mall) 4 the act of doing something more quickly than you would usually