from The Century Dictionary.
- noun A position in a chess problem such that the fact that white or black is to move compels black or white to effect a mate after a stated number of moves. The more modern term for such problems is suimate.
Sorry, no etymologies found.
IV. iii.36 (441,7) one self-mate and mate] The same husband and the same wife.
Notes to Shakespeare, Volume III: The Tragedies Samuel Johnson 1746