<p><strong>Noun:</strong></p><ul><li>A person or thing that ejects.</li><li>In a firearm or gun, the mechanism that, after firing, throws out the empty cartridge or shell.</li><li>Also called eductor.</li><li>A device for inducing a flow of a fluid from a chamber or vessel by using the pressure of a jet of water, air, steam, etc., to create a partial vacuum in such a way as to entrain the fluid to be removed.</li><li>Any of various devices for removing work from a machine or die.</li></ul>