The act or agreement of assuming or taking upon one’s self; the un* dertaking or adoption of a debt or obligation primarily resting upon another, as where the purchaser of real estate “assumes” a mortgage resting upon it, in which case he adopts the mortgage debt as his own and becomes personally liable for its payment Eggleston v. Morrison, 84 111. App. G31; Locke v. Hom-er, 131 Mass. 93, 41 Am. Rep. 199; Springer v. De wolf, 194 III. 218, 62 N. E. 542, 56 L. R. A. 465, 88 Am. St. Rep. 155; Lenz v. Railroad Co., Ill wis. 198, 86 N. W. 607