n.
Function: adjective
Date: 1633
1 : of, relating to, or used in trade
2 a : intended for or limited to persons in a business or industry <a trade publication> < trade sales> b : serving others in the same business rather than the ultimate user or consumer <a trade printing house>
3 also trades : of, composed of, or representing the trades or trade unions <a trade committee>
4 : having a larger softcover format than that of a mass-market paperback and usually sold only in bookstores < trade paperbacks> also : of or relating to the publishing of such books