<p><strong>Verb (used with object)</strong></p><ul><li>to bring in contact, connect, or bring or put together: to join hands; to join pages with a staple.</li><li>to come into contact or union with: The brook joins the river.</li><li>to bring together in a particular relation or for a specific purpose, action, etc.; unite: to join forces against the smugglers.</li><li>to become a member of (an organization, party, etc.): to join a club.</li><li>to enlist in (one of the armed forces): to join the Navy.</li><li>to come into the company of; meet or accompany: I'll join you later.</li><li>to participate with (someone) in some act or activity: My wife joins me in thanking you for the gift.</li><li>to unite in marriage.</li><li>to meet or engage in (battle, conflict, etc.): The opposing armies joined battle.</li><li>to adjoin; meet: His land joins mine.</li><li>to draw a curve or straight line between: to join two points on a graph.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to come into or be in contact or connection: a place where cliffs and sea join.</li><li>to be contiguous or close; lie or come together; form a junction: Our farms join along the river.</li><li>to enlist in one of the armed forces (often followed by up): He joined up to fight for his country.</li><li>to meet in battle or conflict.</li></ul><p><strong>Noun</strong></p><ul><li>a joining.</li><li>a place or line of joining; seam.</li><li>Mathematics. union.</li></ul>