CERTAINTY

n. 1 fact, actuality, reality, truth, Colloq sure thing I would not advise you to neglect a certainty for something doubtful 2 assurance, self-assurance, definiteness, confidence, conviction, faith, authoritativeness, positiveness, certitude The certainty with which he played the card showed he expected it to be a winner 3 for a certainty. assuredly, definitely, certainly, surely, positively; undoubtedly, indubitably, without (a) doubt, undeniably, unquestionably, absolutely, Colloq for sure I know for a certainty that I cannot fly