Pronunciation: (presh'u-rīzd"),[key] —adj. 1. brought to and maintained at an atmospheric pressure higher than that of the surroundings: cooking with pressurized steam. 2. maintained at an air pressure comfortable for breathing: a pressurized cabin and cockpit; a pressurized suit for diving. 3. Informal.subject or subjected to undue pressure or harassment: the pressurized milieu of big business.