Chiefly with defining word. A person who has charge of or looks after a specified thing or operation, esp. in the course of employment. Without…

One who attends to, or has charge of, a machine, a business, etc., as bar-tender (a barman), bridge-tender, machine-tender; now esp. U.S.

A person who operates a machine for transplanting trees. Obsolete. rare.

transferred. One who drives and guides a machine.

(a) a man who operates a machine (esp. a printing machine); (b) chiefly North American, a member or leader of a political machine; a politician…

A person who operates a machine: cf. operate, v. 7; spec. a person who works at the switchboard of a telephone exchange. In early use, frequently…

A person who runs a machine, vehicle, etc.; (sometimes) spec. a train driver.

a boy who attends to a machine.

A person who works a machine, esp. a sewing machine or a machine tool.