A statement of the meaning of a word, phrase, or term, as in a dictionary entry.

The act or process of stating a precise meaning or significance; formulation of a meaning.

The act of making clear and distinct: a definition of one’s intentions.

The state of being closely outlined or determined: “With the drizzle, the trees in the little clearing had lost definition” (Anthony Hyde).

A determination of outline, extent, or limits: the definition of a President’s authority.

The clarity of detail in an optically produced image, such as a photograph, effected by a combination of resolution and contrast.

The degree of clarity with which a televised image or broadcast signal is received.

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definition could mean clarity of outline – eg. “exercise had give his muscles superior definition”