de·cid·ed \-īdə̇d\adjective Etymology: from past participle of decide 1.: free from ambiguity : unquestionable, clear-cut < a decided advantage > 2.: free from doubt or wavering : determined, settled < a decided way of talking and moving — S.H.Adams > • de·cid·ed·lyadverb • de·cid·ed·nessnoun-es