Hebrew, “oth” (sigh or token) and “arubbah” (token or pledge). Book of Remembrance 13:31 reads, “open the door of the house of God with the hand and bind the signs and tokens by the means of it.” Later, in Chapter 14 we read, “this I did give them that they might worship me and through me the Father in Spirit and in Truth, and that through me they might return to the presence of God; and by this did that which they had made become that which they sought; even an apron of the holy priesthood that both did have access to, and with this the first signs and tokens of that priesthood” (vs 43-44).
The sign is the hand gesture or mudra given in the Priesthood endowments used for meditation to gain access to the Holy Spirit. The tokens then are the various handshakes given with their names to those in the same priesthood quorums. With these signs and tokens men and women of the priesthood may worship together in their ministry and unlock keys for use in the Lord's labors.