verb (used with object)
(in certain concrete construction) to apply stress to (reinforcing strands) before subjecting to a load.
to make (a concrete member) with prestressed reinforcing strands.

1930–35; pre- + stress Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
prestress (ˌpriːˈstrɛs)
(tr) to apply tensile stress to (the steel cables, wires, etc, of a precast concrete part) before the load is applied

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
Prestress losses in high-strength concrete girders will generally be less than the losses in lower strength concrete girders.
The columns tested had different mild steel to prestress ratios, which affected their re-centering ability.
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