Mere Motion
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
The free and voluntary act of a party himself, done without the suggestion or influence of another person, is said to be done of his mere motion, ex mero motu, (q. v.) Brown. The phrase is used of an interference of the courts of law, who will, under some circumstances, of their own motion, object to an irregularity in the procoedings, though no objection has bcen taken to the informality by the plaintiff or defendant in the suit.
3 Chit. Gen. Pr. 430.