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rear-view mirror - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

a rear-view mirror

From rear-view +‎ mirror.

rear-view mirror (plural rear-view mirrors)

  1. A mirror inside a vehicle that allows the driver to see the traffic behind.
    Synonym: (Australia, New Zealand) rear vision mirror
    Coordinate term: side-view mirror
  2. (figurative, by extension) The observer's perception of something that is past or has been surpassed.

    Guilt is a powerful emotion in the moment, but it's easy to ignore once it's in the rear-view mirror.

mirror inside a vehicle giving view of the traffic behind