Someone or something that is omnipotent has complete power over things or people. omnipotent (comparative more omnipotent, superlative most omnipotent) Having unlimited power, force or authority. synonyms, coordinate terms, near synonyms quotations Synonyms: almighty, all-powerful Coordinate terms: omnipresent, all-present; omniscient, all-knowing; omnicompetent Near-synonyms: plenipotent, plenipotentiary, omnicompetent Define omnipotence. omnipotence synonyms, omnipotence pronunciation, omnipotence translation, English dictionary definition of omnipotence. adj. Having unlimited or universal power, authority, or force; all-powerful. The word omnipotence derives from the Latin prefix omni -, meaning "all", and the word potens, meaning "potent" or "powerful". Thus the term means "all-powerful".