(1):

(v. t.) To stamp; to detect; to discover.

(2):

(v. t.) To translate from secret characters or ciphers into intelligible terms; as, to decipher a letter written in secret characters.

(3):

(v. t.) To find out, so as to be able to make known the meaning of; to make out or read, as words badly written or partly obliterated; to detect; to reveal; to unfold.