KJV Dictionary Definition: decease
decease
DECE'ASE, n. L. to depart or to withdraw. Literally, departure; hence, departure from this life; death; applied to human beings only.
deceased
DECE'ASED, pp. or a. Departed from life. This is used as a passive participle. He is deceased, for he has deceased; he was deceased, for he had deceased. This use of the participle of an intransitive verb is not infrequent, but the word omitted is really has. He has deceased. It is properly an adjective, like dead.
deceasing
DECE'ASING, ppr. Departing from life; dying.