probably strengthened from 5420; TDNT - 7:939,1127
AV - seal 16; 16
1) a seal
1a) the seal placed upon books
1b) a signet ring
1c) the inscription or impression made by a seal
1c1) of the name of God and Christ stamped upon their foreheads
1d) that by which anything is confirmed, proved, authenticated, as by a seal (a token or proof)