Strong's #4973: sphragis (pronounced sfrag-ece')

probably strengthened from 5420; a signet (as fencing in or protecting from misappropriation); by implication, the stamp impressed (as a mark of privacy, or genuineness), literally or figuratively:--seal.

Thayer's Greek Lexicon:

́

sphragis

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)

Part of Speech: noun feminine

Relation: probably strengthened from G5420

Citing in TDNT: 7:939, 1127

Usage:

This word is used 16 times:

 

Romans 4:11: "he received the sign of circumcision, a seal of the righteousness of the faith"
1 Corinthians 9:2: "to you: for the seal of mine apostleship are ye"
2 Timothy 2:19: "sure, having this seal, The Lord knoweth them that are his."
Revelation 5:1: "on the backside, sealed with seven seals."
Revelation 5:2: "and to loose the seals thereof?"
Revelation 5:5: "and to loose the seven seals thereof."
Revelation 5:9: "and to open the seals thereof: for thou wast slain, and"
Revelation 6:1: "one of the seals, and I heard, as it were the noise"
Revelation 6:3: "he had opened the second seal, I heard the second beast"
Revelation 6:5: "he had opened the third seal, I heard the third beast"
Revelation 6:7: "he had opened the fourth seal, I heard the voice of the fourth"
Revelation 6:9: "he had opened the fifth seal, I saw under the altar"
Revelation 6:12: "he had opened the sixth seal, and, lo, there was a great"
Revelation 7:2: "from the east, having the seal of the living God: and"
Revelation 8:1: "he had opened the seventh seal, there was silence in heaven"
Revelation 9:4: "have not the seal of God in their foreheads."