Definitions from Wiktionary ( )

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

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