4. An arrangement to attain a desired result by a combination of interested parties; -- applied to stock speculations and political bargains. [Slang]
5. [Prob. from D. deel a plank, threshing floor. See Thill.] The division of a piece of timber made by sawing; a board or plank; particularly, a board or plank of fir or pine above seven inches in width, and exceeding six feet in length. If narrower than this, it is called a batten; if shorter, a deal end.
Whole deal is a general term for planking one and one half inches thick.