THOROUGH

adj. 1 thoroughgoing, complete, downright, perfect, through-and-through, total, unmitigated, undiluted, unmixed, unalloyed, out-and-out, unqualified, sheer, utter, arrant, absolute, proper I have rarely encountered such thorough stupidity 2 exhaustive, extensive, painstaking, meticulous, assiduous, careful, scrupulous, particular, conscientious, methodical Police conducted a thorough search but found nothing 3 extensive, exhaustive, detailed, in-depth, comprehensive, full, complete, all-inclusive, total, all-embracing, encyclopedic or encyclopaedic, universal, A-to-Z, Colloq all-out We need someone who has a thorough knowledge of the terrain