To justify means to show or prove something to be right, reasonable, or necessary; to give a good reason for an action, decision, or belief.
What Does Justify Mean?
Justify comes from the Latin justificare, meaning "to make righteous" or "to show as correct", from justus (just, fair) and facere (to make). It entered English via Old French in the 14th century. The core meaning has remained stable: when you justify something, you are not simply describing it — you are arguing that it was the correct or acceptable choice.
The word appears in three main contexts in modern English. In everyday speech it means "to give a reason": "Can you justify your decision?" In academic and professional writing it means "to provide evidence for a position": "This data justifies our conclusion." In printing and typography it has a technical meaning: text that is aligned along both margins is described as justified.
A common ESL error is using justify where explain is the better choice. Explain is neutral — you describe why something happened. Justify is argumentative — you claim something was right. Another frequent mistake is "justify to do" instead of "justify doing": say "She justified taking the risk", not "She justified to take the risk."
Example Sentences
| Sentence | Usage note |
|---|---|
| The manager struggled to justify the budget cuts to her team. | justify + noun phrase (professional) |
| Nothing can justify treating people with disrespect. | justify + gerund (ethical/moral) |
| The essay should justify your argument with evidence from the text. | academic writing instruction |
| He justified his late arrival by explaining there had been a train delay. | justify + noun + by + gerund |
| Can you really justify spending that much on a gym membership? | informal / questioning a decision |
| The success of the project justified all the long hours the team had put in. | outcome justifies effort |
| The court found that the use of force was not justified in this case. | legal register, passive voice |
| Politicians are often asked to justify their policies to voters. | political / public accountability |
Word Forms
| Form | Word | Example |
|---|---|---|
| Verb (base) | justify | You need to justify your answer. |
| Verb (past) | justified | She justified her decision with clear reasons. |
| Verb (gerund) | justifying | Justifying every choice takes time. |
| Noun | justification | There is no justification for that behaviour. |
| Adjective | justified | His anger was completely justified. |
| Adjective (negative) | unjustified | The criticism was unjustified and hurtful. |
| Adverb | justifiably | She was justifiably proud of her results. |
Common Collocations
| Collocation | Example phrase |
|---|---|
| justify a decision | "The board had to justify its decision to shareholders." |
| justify the cost | "The improved performance justifies the extra cost." |
| justify the means | "Does the end really justify the means?" |
| fully justified | "Her concerns were fully justified by later events." |
| justify one's actions | "He was unable to justify his actions in court." |
| hardly justify | "One bad review can hardly justify changing the whole product." |
| justify an argument | "You must justify your argument with reliable sources." |
| morally justify | "It is difficult to morally justify the use of child labour." |
Synonyms
Antonyms
Common Mistakes
Watch Out For
She justified to take the extra money.
She justified taking the extra money. (Use a gerund after justify, not an infinitive.)
He justified himself the mistake.
He justified the mistake. (Do not add a reflexive pronoun unless the meaning is self-vindication: "He justified himself to the committee.")
I need to justify why I was late. (overly casual in formal writing)
I need to provide justification for my late arrival. (formal/written register)