Definition of "excision" [ex•ci•sion]

• The deletion of some text during editing. (noun)
• The removal of a tumor, etc., by cutting. (noun)
• The removal of a gene from a section of genetic material. (noun)
• The fact that, under certain hypotheses, the homology of a space relative to a subspace is unchanged by the identification of a subspace of the latter to a point. (noun)

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• "But for girls, this practice-called 'excision'-is very dangerous and should be strongly discouraged."
• "342 Here again a little excision is necessary; the reader already knows all about it."
• "That’s one nasty infection you have there buddy, complete excision is going to be needed."