expedition
n. countable B1 Intermediate Oxford US //ˌɛkspəˈdɪʃən// UK //ˌɛkspədˈɪʃən// ex·pe·di·tion
n. a long and organized trip made for a special reason. People usually go on these to explore new places or to study something in nature.
n. a journey undertaken by a group of people with a particular purpose, especially that of exploration, research, or war.
The scientists are planning an expedition to the rainforest.
The mountain expedition was delayed for several days due to heavy snow and poor visibility.
Historical records indicate that the naval expedition was intended to map the coastline, though it eventually served as a strategic military reconnaissance mission.
From Middle French expédition, and its source, Latin expeditio.
Usage
Often takes the preposition 'to' for the destination and 'on' for the action of going.