<p><strong>Verb (used with object)</strong></p><ul><li>to put (thought) into words; utter or state: to express an idea clearly.</li><li>Synonyms: formulate, word, declare.</li><li>to show, manifest, or reveal: to express one's anger.</li><li>Synonyms: indicate.</li><li>Antonyms: conceal.</li><li>to set forth the opinions, feelings, etc., of (oneself), as in speaking, writing, or painting: He can express himself eloquently.</li><li>to represent by a symbol, character, figure, or formula: to express water as H2O; to express unknown quantities algebraically.</li><li>Synonyms: denote, signify, designate.</li><li>to send by express: to express a package or merchandise.</li><li>to press or squeeze out: to express the juice of grapes.</li><li>to exude or emit (a liquid, odor, etc.), as if under pressure: The roses expressed a sweet perfume.</li><li>Genetics: (of a gene) to be active in the production of (a protein or a phenotype).</li></ul><p><strong>Adjective</strong></p><ul><li>clearly indicated; distinctly stated; definite; explicit; plain: He defied my express command.</li><li>Synonyms: unambiguous, obvious.</li><li>special; definite: We have an express purpose in being here.</li><li>Synonyms: singular, particular.</li><li>direct or fast, especially making few or no intermediate stops: an express train; an express elevator.</li><li>Synonyms: swift, nonstop, rapid.</li><li>used for direct or high-speed travel: an express highway.</li><li>duly or exactly formed or represented: an express image.</li><li>Synonyms: precise, accurate.</li><li>pertaining to an express: an express agency.</li></ul><p><strong>Noun</strong></p><ul><li>an express train, bus, elevator, etc.</li><li>a system or method of sending freight, parcels, money, etc., that is faster and safer, but more expensive, than ordinary freight service: We agree to send the package by express.</li><li>Synonyms: courier.</li><li>a company engaged in this business.</li><li>British: a messenger or a message specially sent.</li><li>something sent by express.</li></ul><p><strong>Adverb</strong></p><ul><li>by express: to travel express.</li><li>Obsolete: expressly.</li></ul>