1. (noun)well a deep hole or shaft dug or drilled to obtain water or oil or gas or brine
2. (noun)well a cavity or vessel used to contain liquid
3. (noun)well, wellspring, fountainhead an abundant source
"she was a well of information"
4. (noun)well an open shaft through the floors of a building (as for a stairway)
5. (noun)well an enclosed compartment in a ship or plane for holding something as e.g. fish or a plane's landing gear or for protecting something as e.g. a ship's pumps
6. (adj)well in good health especially after having suffered illness or injury
"appears to be entirely well"; "the wound is nearly well"; "a well man"; "I think I'm well; at least I feel well"
7. (adj)good, well(p) resulting favorably
"it's a good thing that I wasn't there"; "it is good that you stayed"; "it is well that no one saw you"; "all's well that ends well"
8. (adj)well(p) wise or advantageous and hence advisable
"it would be well to start early"
9. (verb)well, swell come up, as of a liquid
"Tears well in her eyes"; "the currents well up"