Definition of well verb from the Oxford Advanced American Dictionary

Oxford3000

well

verb
/wɛl/
 
 
1 [intransitive] well (up) (of a liquid) to rise to the surface of something and start to flowTears were welling up in her eyes.2 [intransitive] well (up) (literary) (of an emotion) to become strongerHate welled up inside him as he thought of the two of them together.