explicit
absolute, categorical, certain, clear, definite, direct, distinct, exact, express, frank, open, outspoken, patent, plain, positive, precise, round, specific, stated, straightforward, unambiguous, unequivocal, unqualified, unreserved, upfront (informal)
Antonyms
ambiguous, cryptic, general, implicit, implied, indefinite, indirect, inexact, obscure, oracular, suggested, uncertain, vague