Available Definitions:
1) a. - Professional; practiced.
2) v. - Course; custom; practice; occupation; employment.
3) v. - Business of any kind; matter of mutual consideration; affair; dealing.
4) v. - Specifically: The act or business of exchanging commodities by barter, or by buying and selling for money; commerce; traffic; barter.
5) v. - The business which a person has learned, and which he engages in, for procuring subsistence, or for profit; occupation; especially, mechanical employment as distinguished from the liberal arts, the learned professions, and agriculture; as, we speak of the trade of a smith, of a carpenter, or mason, but not now of the trade of a farmer, or a lawyer, or a physician.
6) v. - Instruments of any occupation.
7) v. - A company of men engaged in the same occupation; thus, booksellers and publishers speak of the customs of the trade, and are collectively designated as the trade.
8) v. - The trade winds.
9) v. - Refuse or rubbish from a mine.
10) v. i. - To barter, or to buy and sell; to be engaged in the exchange, purchase, or sale of goods, wares, merchandise, or anything else; to traffic; to bargain; to carry on commerce as a business.
11) v. i. - To buy and sell or exchange property in a single instance.
12) v. i. - To have dealings; to be concerned or associated; -- usually followed by with.
13) v. t. - To sell or exchange in commerce; to barter.
14) - imp. of Tread.