σφραγίζω
[in LXX chiefly for חתם (De 32:34, al.), also for סתם (Da TH 8:26);]
to seal,
(a) for security: Mt 27:66, Re 20:3; τ. καρπὸν τοῦτον, fig. (cf. Deiss., BS, 238 f.; MM, xxiv; DB, iv, 427a), Ro 15:28;
(b) for concealment, hence, metaph., to hide (Da TH 9:24, Jo 14:17): Re 10:422:10;
(c) for distinction, Re 7:3-8; metaph., Eph 1:134:30; mid., II Co 1:22;
(d) for authentication (Es 8:8): Jo 3:336:27 (cf. κατα-σφραγίζω).†