| Manhole (n.) A hole through which a man may descend or creep into a drain, sewer, steam boiler, parts of machinery, etc., for cleaning or repairing. Thesaurus Entries air hole, armhole, blowhole, bullet-hole, bunghole, cringle, deadeye, eye, eyelet, gasket, grommet, guide, keyhole, knothole, loop, loophole, mousehole, peephole, pigeonhole, pinhole, placket, placket hole, porthole, punch-hole, spiracle, tap, vent, venthole |