trans·gress / transˈgres; tranz-/ • v. [tr.] infringe or go beyond the bounds of (a moral principle or other established standard of behavior): she had transgressed an unwritten social law | [intr.] they must control the impulses that lead them to transgress. ∎ Geol. (of the sea) spread over (an area of land).DERIVATIVES: trans·gres·sion / -ˈgreshən/ n.trans·gres·sor / -ˈgresər/ n.