Ob·rep'tion noun [ Latin obreptio , from obrepere , obreptum , to creep up to; ob (see Ob- ) + repere to creep.] 1. The act of creeping upon with secrecy or by surprise. [ Obsolete] Cudworth. 2. (Scots Law) The obtaining gift... Found on http://www.encyclo.co.uk/webster/O/4