WordNet sense 1 (communicated in words):

uttered, verbalised, verbalized

WordNet sense 2 (uttered through the medium of speech or characterized by speech; sometimes used in combination):

spoken

WordNet sense 3 (not tacit or implied):

express

WordNet sense 4 (clearly defined or formulated):

definitive

WordNet sense 5 (precisely and clearly expressed or readily observable; leaving nothing to implication):

explicit