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Noun: red ink
  1. The amount by which the cost of a business exceeds its revenue
    - loss, red
Verb: red-ink  red ingk
  1. Mark with red ink
    "red-ink the area that is restricted"

Derived forms: red-inking, red-inks, red inks, red-inked

Type of: amount, amount of money, ink, sum, sum of money