Main Entry: positive end–expiratory pressure Function: noun : a technique of assisting breathing by increasing the air pressure in the lungs and air passages nearthe end of expiration so that an increased amount of air remains in the lungs following expiration —abbreviation PEEP; —compare CONTINUOUS POSITIVE AIRWAY PRESSURE
positive end-expiratory pressuren. Abbr. PEEP A technique used in respiratory therapy in which pressure is maintained in the airway so that the lungs empty less completely in expiration.