Definition of "hi-vis" [hi-vis]

• High-visibility. (adjective)

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• "A forve with hi-vis tasers as an alternative to the baton? or as an alternative to the H&K?"
• "While the standard uniform looks OK on a Saturday night, the combination of hi-vis refuse collector style jacket, black fleece and PPE belt just looks awful on such occasions. on November 10, 2009 at 6: 47 am JuliaM"
• "She immediately donned her hi-vis diversity jacket and leapt into action knocking down 2 old men in the procession."