simple past tense and past participle of M'Naught

present participle of M'Naught

A surname.

Third-person singular simple present indicative form of M'Naught

(transitive) To increase the power of (a single-cylinder beam engine) by adding a small high-pressure cylinder with a piston acting on the beam between the centre and the flywheel end, using high-pressure steam and working as a compound engine.