| well | a deep hole or shaft dug or drilled to obtain water or oil or gas or brine |
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| 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 |
| well | an open shaft through the floors of a building (as for a stairway) |
| well | a cavity or vessel used to contain liquid |
| well | an abundant source |
| well | come up, as of liquids |
| well | wise or advantageous and hence advisable |
| well | resulting favorably |
| well | in good health especially after having suffered illness or injury |
| well | (often used as a combining form) in a good or proper or satisfactory manner or to a high standard |
| well | without unusual distress or resentment |
| well | indicating high probability |