\Un`der*tak"er\, n. 1. One who undertakes; one who engages in any project or business. --Beau. & Fl. 2. One who stipulates or covenants to perform any work for another; a contractor. To sign deputations for undertakes to furnish their proportions of saltpeter. --Evelyn. In come some other undertakes, and promise us the same or greater wonders. --South. 3. Specifically, one who takes the charge and management of funerals.