prestressed Syllabification: (pre·stressed)Pronunciation: /prēˈstrest/Definition of prestressed adjective strengthened by the application of stress during manufacture, especially (of concrete) by means of rods or wires inserted under tension before the material is set. Derivatives prestressingPronunciation: /-ˈstresiNG/ noun prestressed in other Oxford dictionaries Definition of prestressed in the British & World English dictionary