blue-pencil

From blue +‎ pencil.

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blue-pencil (third-person singular simple present blue-pencils, present participle (UK) blue-pencilling or (US) blue-penciling, simple past and past participle (UK) blue-pencilled or (US) blue-penciled)

1. (transitive) To edit, especially to censor, written documents.
2. (politics, slang) To use a line-item veto.

• red-pencil
• blue pencil doctrine

• pencil-blue