What does well mean?
Well is a highly versatile English word used as an adjective, adverb, noun, verb, and interjection. As an adjective, it describes a person, thing, or situation as healthy, satisfactory, successful, or otherwise in good condition. As an adverb, it modifies a verb or another adverb, generally indicating that an action is performed properly, to a sufficient standard, or to an unusual degree: “She sings well.” It can also express the degree or extent of a quality, as in “The library is well stocked.” When used as a noun, well usually means a deep shaft or hole from which water rises, though it can also refer metaphorically to a source of abundance. As an interjection, well introduces surprise, relief, hesitation, or a gentle correction. Its flexibility makes it useful in everyday conversation, formal writing, and descriptive contexts alike, although informal uses such as “well, honestly” may sound conversational rather than formal.
In good health; satisfactory, effective, successful, or suitable.
"She felt well after a week of rest."
The health sense is especially common in British and American English. In other contexts, “well” often means strongly or unmistakably, as in “a well-defined plan.”
In a good, satisfactory, or effective manner; to a satisfactory degree; to a greater extent than usual.
"The mechanism works well even in cold weather."
The adverb can intensify another word and is especially frequent in informal conversation.
A deep hole, shaft, or spring from which water or another liquid rises; also, figuratively, a source of something valuable.
"The village draws drinking water from a well beside the church."
The noun is often used in the established expressions “oil well,” “artesian well,” and “a wellspring of.”
Used to express surprise, relief, hesitation, concession, or an attempt to gain attention before speaking.
"Well, I did not expect that at all."
It is common in conversation and often functions as a conversational opening or transition.
The plural is used when referring to more than one water source or well.
"The old wells were covered with moss."
From a source of water to the idea that everything is as it should be, well has long connected health, abundance, and sufficiency.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does well come from?
The word descends from Old English well, which was used for favorable health and good quality, and from closely related Old English forms associated with a water source. Its Germanic relatives include Dutch wel, German wohl, and Old Norse vel. Over time, the word extended beyond physical health to mean whatever is good, satisfactory, proper, or abundant, which accounts for many of its modern meanings.
Related word forms
How well is actually used
The adverb is very common in informal speech, where it can soften a statement or emphasize degree: “I know it well.” In formal contexts, “very well” and “well done” may sound more polished. In health contexts, “well” can mean physically healthy, while “not well” is a conventional, often tactful way to say that someone is unwell.
Easily confused with well
Well describes something satisfactory, healthy, or properly done, while will expresses future intention or determination.