The lifting occurring when a cold front plows under a warmer air mass or when warm air flows upslope over the warm frontal surface where colder air is below. In both cases, the warmer and more moist (less dense) air mass is lifted.
FRONTAL LIFTING
Meaning of FRONTAL LIFTING in English
Weather and meteorology English vocabulary. Английский словарь погоды и метеорологии . 2012