trade or business
trade or business. Tax. Any business or professional activity conducted by a taxpayer with the objective of earning a profit. • If the taxpayer can show that the primary purpose and intention is to make a profit, the taxpayer may deduct certain expenses as trade-or-business expenses under the Internal Revenue Code. [Cases: Internal Revenue 3314.1–3318. C.J.S. Internal Revenue §§ 150–153, 163, 184, 270.]