Definition of see red in US English:

see red

phrase

informal
  • Become very angry suddenly.

    ‘the mere thought of Peter with Nicole made her see red’
    • ‘Protesters wore red to the rally to symbolise that the community was seeing red over the issue.’
    • ‘Well, the topic of Christmas greenery has residents in one Florida county seeing red.’
    • ‘It's far too soon to know if there will be any takers, but at first brush France still appears to be seeing red.’
    • ‘Why he was suddenly seeing red over the same man he'd been berating all week, he didn't know.’
    • ‘And a new financial crisis has police in St. Bernard Parish seeing red.’
    • ‘Allotment holders are seeing red after burglaries and raids by vandals left their gardens in a mess.’
    • ‘But when I see money being spent (and natural resources depleted) to make people more miserable, it just makes me see red.’
    • ‘These are the thoughts that have pro-war conservatives seeing red.’
    • ‘They are reading things like this and seeing red.’
    • ‘Recent damage in local woodlands to hides on a lake, and to equipment on the playing field, plus damage to a lamppost opposite the village hall has made councillors see red.’
    become very angry, become enraged, go into a rage, lose one's temper
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