Definition of "guttering" []

• Gutters considered as a group. (noun)
• Present participle of gutter. (verb)
• Flickering and about to be extinguished (adjective)

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• "We drank rainwater funnelled by guttering from the house roof into a galvanised iron tank."
• "A common problem with scanning an opened book is "guttering", which happens when the spine of the book is not pressed flat enough, and the inside of each page, where it meets the spine, is curved against the glass."
• "If you find this kind of "guttering" regularly in your own scans, where the characters near the spine are not being recognized correctly by your OCR, you need to make sure that your book is down as flat as possible before making a scan."