Testamentary capacity
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
That measure of mental ability which is recognized in law as sufficient for the making a will.
See Nicewander v. Nicewander, 151 111. 156, 37 N. E. 698; Delafield v. Parish, 25 N. Y. 29; Yardley v. Cuthbertson. 108 Pa. 395, 1 Atl. 765, 56 Am. Rep. 218; Leech v. Leech, 21 Pa. 67; Duffield v. Robeson, 2 Har. (Del.) 379; Lowe v. Williamson, 2 N. J. Eq. 85.