<p><strong>Adjective</strong></p><ul><li>having, characterized by, or showing superior power or strength: mighty rulers.<ul><li>Synonyms: puissant, strong</li><li>Antonyms: feeble</li></ul></li><li>of great size; huge: a mighty oak.<ul><li>Synonyms: sizable, tremendous, enormous, immense</li><li>Antonyms: small</li></ul></li><li>great in amount, extent, degree, or importance; exceptional: a mighty accomplishment.</li></ul><p><strong>Adverb</strong></p><ul><li>Informal. very; extremely: I'm mighty pleased.</li></ul><p><strong>Noun</strong></p><ul><li>(used with a plural verb) mighty persons collectively: the rich and the mighty.</li></ul>