Definition of "hairlines" [hairlines]

• Plural form of hairline. (noun)

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• "The use of a laser to obliterate hairlines (narrow, shallow scratches) by somewhat melting and smoothing the metal surrounding the hairlines is obviously coin doctoring."
• "Everyone seems to like men with six-pack abs, but liking guys with receding hairlines is a lot rarer."
• "Conversely, there was no associated link between men who had receding hairlines, which is called frontal baldness, and prostate cancer."