(uncountable) Buying and selling of goods and services on a market.
(countable) A particular instance of buying or selling.
(countable) An instance of bartering items in exchange for one another.
(countable) Those who perform a particular kind of skilled work.
(countable) Those engaged in an industry or group of related industries.
(countable) The skilled practice of a practical occupation.
(countable or uncountable) An occupation in the secondary sector, as opposed to an agricultural, professional or military one.
(uncountable, UK) The business given to a commercial establishment by its customers.
(chiefly in the plural) Steady winds blowing from east to west above and below the equator.
(only as plural) A publication intended for participants in an industry or related group of industries.
(uncountable, gay slang) A masculine man available for casual sex with men, often for pay. (Compare rough trade.)
(mining) Refuse or rubbish from a mine.
(transitive, intransitive) To engage in trade.
(finance, intransitive, copulative) To be traded at a certain price or under certain conditions.
(transitive, with for) To give (something) in exchange (for).
(transitive) To mutually exchange (something) (with).
(transitive, with on) To use or exploit a particular aspect, such as a name, reputation, or image, to gain advantage or benefit.
(horticulture, transitive or intransitive) To give someone a plant and receive a different one in return.
(transitive, intransitive) To do business; offer for sale as for one's livelihood.
(intransitive) To have dealings; to be concerned or associated (with).
(transitive) To recommend and get recommendations.
Of a product, produced for sale in the ordinary bulk retail trade and hence of only the most basic quality.