Meaning of JUSTIFY in English

JUSTIFY

jus ‧ ti ‧ fy S3 W3 AC /ˈdʒʌstəfaɪ, ˈdʒʌstɪfaɪ/ BrE AmE verb ( past tense and past participle justified , present participle justifying , third person singular justifies ) [transitive]

[ Word Family: adjective : ↑ justifiable ≠ ↑ unjustifiable , ↑ justified ≠ ↑ unjustified ; verb : ↑ justify ; noun : ↑ justification ; adverb : ↑ justifiably ≠ ↑ unjustifiably ]

[ Date: 1300-1400 ; Language: French ; Origin: justifier , from Late Latin justificare , from Latin justus ; ⇨ ↑ just 2 ]

1 . to give an acceptable explanation for something that other people think is unreasonable:

Ministers must appear before Parliament and justify their actions.

justify doing something

How can we justify spending so much money on arms?

justify yourself (=prove that what you are doing is reasonable)

I don’t have to justify myself to you or anyone else.

2 . to be a good and acceptable reason for something:

Nothing justifies murdering another human being.

3 . technical to arrange lines of words on a page or computer screen so that they form a straight edge on both the right and left sides

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.