<p><strong>Noun</strong></p><ul><li>A respectful or formal term of address used to a man (e.g., "No, sir").</li><li>The distinctive title of a knight or baronet (e.g., "Sir Walter Scott").</li><li>A title of respect for some notable personage of ancient times (e.g., "Sir Pandarus of Troy").</li><li>A lord or gentleman (e.g., "noble sirs and ladies").</li><li>An ironic or humorous title of respect (e.g., "sir critic").</li><li>Archaic: A title of respect used before a noun to designate profession, rank, etc. (e.g., "sir priest").</li></ul>