1) to set a seal upon, mark with a seal, to seal

a) for security: from Satan

b) since things sealed up are concealed (as the contents of a letter), to hide, keep in silence, keep secret

c) in order to mark a person or a thing

1) to set a mark upon by the impress of a seal or a stamp

2) angels are said to be sealed by God

d) in order to prove, confirm, or attest a thing

1) to confirm authenticate, place beyond doubt

a) of a written document

b) to prove one's testimony to a person that he is what he professes to be