Dictionary
brain•work
Pronunciation: (brān'wûrk"), [key]—
n.
1. work or effort consisting principally or largely of mental activity, thought, imagination, etc., as opposed to physical or manual work.
2. the effort of thought, reasoning, planning, or the like; ordered or directed thinking:
Solving problems is a form of brainwork. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.