<p><strong>noun</strong></p><ul><li>A person or thing that closes: A door with a mechanical closer.</li><li>A person or thing that concludes: The piece would be a great closer for a concert.</li><li>Baseball: A relief pitcher brought in toward the end of the game to hold the team’s lead.</li><li>A person who brings something, especially a business deal, to a successful conclusion: A car salesman known as one of the best closers.</li><li>Also called closure.</li><li>Masonry: Any of various specially formed or cut bricks for spacing or filling gaps between regular bricks or courses of regular brickwork.</li></ul>