1. To provide an acceptable explanation for.
    How can you justify spending so much money on clothes?
    Paying too much for car insurance is not justified.
  2. To be a good, acceptable reason for; warrant.
    Nothing can justify your rude behaviour last night.
  3. To arrange (text) on a page or a computer screen such that the left and right ends of all lines within paragraphs are aligned.
    The text will look better justified.
  4. To absolve, and declare to be free of blame or sin
  5. To prove; to ratify; to confirm.

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