An estate in fee but which is liable to be defeated by some futurecontingency; e. g., a vested remainder which might be defeated by the death of theremainderman he- fore the time fixed for the taking effect of the devise. Forsvthe v.Lansing, 109 Ivy. 518, 59 S. W. 854: Wills v. Wills, 85 Ivy. 480. 3 S. W. 900.