To provide an acceptable explanation for.
How can you justify spending so much money on clothes?
To be a good reason behind a normally-unacceptable action; to warrant.
Nothing can justify your rude behaviour last night.
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.
From Middle English justifien, from Old French justifier, from Late Latin justificare (“make just”), from Latin justus, iustus (“just”) + ficare (“make”), from facere, equivalent to just + -ify.
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