Obreption \Ob*rep"tion\, n. [L. obreptio, fr. obrepere, obreptum, to creep up to; ob (see {Ob-}) + repere to creep.] 1. The act of creeping upon with secrecy or by surprise. [Obs.] --Cudworth. 2. (Scots Law) The obtaining gifts of escheat by fraud or surprise. --Bell.