Definition of Entirety

The whole, in contradistinction to a moiety or part only. When land is conveyed to husband and wife, they do not take by moieties, but both are seised of the entirety. Parceners, on the other hand, have not an entirety of interest, but each is properly entitled to the whole of a distinct moiety. 2 Bl.Comm. 188. See Estate by the entirety.

The word is also used to designate that which the law considers as one whole, and not capable of being divided into parts. Thus, a judgment, it is held, is an entirety, and, if void as to one of the two defendants, cannot be valid as to the other. Also, if a contract is an entirety, no part of the consideration is due until the whole has been performed.

That's the definition of Entirety in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.