noun.
One that reaps, especially a machine for harvesting grain or pulse crops.
The Century Dictionary and Cyclopedia
noun.
One who reaps; one who cuts grain with a sickle or other implement or machine; hence, one who gathers in the fruits of his own or others' labor or work.
noun.
A machine for cutting grain; a reaping-machine.
the GNU version of the Collaborative International Dictionary of English