in a good or satisfactory way

the whole team played well

I haven't been sleeping very well

they seem to get on pretty well

in a thorough manner

add the mustard and lemon juice and mix well

very probably; in all likelihood

being short of breath may well be the first sign of asthma

in good health; free or recovered from illness

I don't feel very well

it would be some time before Sarah was completely well

I am not a well man

sensible; advisable

it would be well to know just what this suggestion entails

used to express a range of emotions including surprise, anger, resignation, or relief

Well, really! The manners of some people!

a shaft sunk into the ground to obtain water, oil, or gas

a plentiful source or supply

she could feel a deep well of sympathy and compassion

an enclosed space in the middle of a building, giving room for stairs or a lift, or to allow light or ventilation

a shelf beneath the counter of a bar on which bottles of alcohol are stored within easy reach of the person serving

you would have never heard of the label of the gin in the well in average bars

a region of minimum potential

a gravity well

(of a liquid) rise up to the surface and spill or be about to spill

tears were beginning to well up in her eyes