COMMERCE Copy link • COMMERCE 1. mercatura (especially of the merchant): mercatio (commercial transaction, the buying and selling, Gell., 3, 3): negotium, or plur., negotia (the business which anybody carries on, especially as corn-merchant and money-lender): commercium (commerce, commercial intercourse, Sall., Jug: 18, 6: Pliny 33, 1, 3; with anything, alicujus rei, Plin., 12, 14, 30: then also = liberty of commerce): wholesale business, mercatura magna et copiosa: in retail, mercatura tenuis [Vid: TRADE]. The Roman merchants carry on a commerce with Gaul, mercatores Romani ad Gallos commeant (i. e., they visit Gaul with their merchandise, Caes., B.G., 1, 1). Social intercourse, conversatio (Velleius, Quint..): usus: consuetudo (of his service, etc.): convictus (in so far as one lives with anybody): Vid: INTERCOURSE. 2. v. Vid: the above article.