<p><strong>Noun</strong></p><ul><li>Hinduism: A memorable or effective word or formula, as from the Veda, chanted or sung as an incantation or prayer.</li><li>An often repeated word, formula, or phrase, often a truism: "If I hear the 'less is more' mantra one more time, I'll scream."</li><li>A native or inhabitant of Byzantium.</li><li>A word printed at the top of a page in a dictionary or other reference book to indicate the first or last entry or article on that page.</li><li>A device, used especially in old books, to assist the binder in assembling signatures by inserting at the foot of each page the first word of the following page.</li><li>Keyword (def 3).</li></ul>