<p><strong>Noun</strong></p><ul><li>Music.</li><li>Plural: concertos, concerti.</li><li>A composition for one or more principal instruments, with orchestral accompaniment, now usually in symphonic form.</li><li>A public musical performance in which a number of singers or instrumentalists, or both, participate.</li><li>A public performance, usually by an individual singer, instrumentalist, or the like; recital.</li><li>An act or instance of reciting.</li><li>A detailed statement; an account, narrative, or description (e.g., "He gave a recital of the things he'd been doing since we'd last seen him.").</li><li>Agreement of two or more individuals in a design or plan; combined action; accord or harmony (e.g., "His plan was greeted with a concert of abuse.").</li></ul><p><strong>Adjective</strong></p><ul><li>Designed or intended for concerts (e.g., concert hall).</li><li>Performed at concerts (e.g., concert music).</li><li>Performing or capable of performing at concerts (e.g., a concert pianist).</li></ul><p><strong>Verb</strong></p><ul><li>(Used with object) To contrive or arrange by agreement (e.g., "They were able to concert a settlement of their differences.").</li><li>To plan; devise (e.g., "A program of action was concerted at the meeting.").</li><li>(Used without object) To plan or act together.</li></ul>