Definition of wellwell - adj. wise or advantageous and hence advisable; in good health especially after having suffered illness or injury; resulting favorably; adv. (often used as a combining form) in a good or proper or satisfactory manner or to a high standard (`good' is a nonstandard dialectal variant for `well'); without unusual distress or resentment; with good humor; indicating high probability; in all likelihood; thoroughly or completely; fully; often used as a combining form; favorably; with approval; to a suitable or appropriate extent or degree; in financial comfort; in a manner affording benefit or advantage; to a great extent or degree; with skill or in a pleasing manner; with prudence or propriety; with great or especially intimate knowledge; (used for emphasis or as an intensifier) entirely or fully; noun a deep hole or shaft dug or drilled to obtain water or oil or gas or brine; 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; an open shaft through the floors of a building (as for a stairway); a cavity or vessel used to contain liquid; an abundant source; verb come up, as of a liquid.
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