To send, take or carry an article of trade or commerce out of the country. To transport merchandise from one country to another in the course of trade. (Source: GEMET/WESTS)
The act or process of buying, selling, or exchanging commodities within a country or between countries. (Source: dictionary.com)
Any export, re-export, import and introduction from the sea.
(Source: CITES, Art. 1)