noun
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a very thin, threadlike mark; esp. a long, thin mark made by a pencil, pen, chalk, etc.; a line.
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a shallow cut, mark or tear made by a nail or something sharp or rough on the surface of; a scratch.
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any of long, slightly depressed, natural marks of the palm.
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a fold of the skin as of the forehead (as while frowning or being in depressed, sad or angry mood).
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the limit, acting, going beyond which is considered as transgression, breach, etc.