(1):
(n.) A horizontal piece of timber secured to the uprights and supporting floor timbers, a staircase, scaffolding, or the like. It differs from an intertie in being intended to carry weight.
(2):
(n.) A large flat stone, esp. one laid over a tomb.
(3):
(n.) A book in which a summary of accounts is laid up or preserved; the final book of record in business transactions, in which all debits and credits from the journal, etc., are placed under appropriate heads.