adj. 25B6; adjective
the conventional wisdom of the day : ORTHODOX, traditional, established, accepted, received, mainstream, prevailing, prevalent, accustomed, customary.
a conventional railway : NORMAL, standard, regular, ordinary, usual, traditional, typical, common.
a very conventional woman : CONSERVATIVE, traditional, traditionalist, conformist, bourgeois, old-fashioned, of the old school, small-town, suburban; informal straight, square, stick-in-the-mud, fuddy-duddy.
a conventional piece of work : UNORIGINAL, formulaic, predictable, stock, unadventurous, unremarkable.
unorthodox, original.