the GNU version of the Collaborative International Dictionary of English
n. Work done by the piece or job; work paid for at a rate based on the amount of work done, rather than on the time employed.
The Century Dictionary and Cyclopedia
n. Work done and paid for by measure of quantity, or by previous estimate and agreement, in contradistinction to work done and paid for by measure of time.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. work paid for according to the quantity produced
Word Usage
"She did what they called 'piecework' and would sew up these dresses for a penny each."