<p><strong>Noun</strong></p><ul><li>the head or leader of an organized body of people; the person highest in authority: the chief of police.</li><li>the head or ruler of a tribe or clan: an Indian chief.</li><li>Chief, U.S. Army. a title of some advisers to the Chief of Staff, who do not, in most instances, command the troop units of their arms or services: Chief of Engineers; Chief Signal Officer.</li><li>Informal: Sometimes Offensive. boss or leader: We'll have to talk to the chief about this.</li><li>Heraldry. the upper area of an escutcheon.</li><li>an ordinary occupying this area.</li></ul><p><strong>Adjective</strong></p><ul><li>highest in rank or authority: the chief priest; the chief administrator.</li><li>most important; principal: his chief merit; the chief difficulty.</li></ul><p><strong>Synonyms</strong></p><ul><li>paramount, prime, leading, foremost, cardinal.</li></ul><p><strong>Antonyms</strong></p><ul><li>subordinate.</li></ul><p><strong>Adverb</strong></p><ul><li>Archaic. chiefly; principally.</li></ul>