Tell it apart
| Aspect | Disinterested | Uninterested |
|---|---|---|
| Core meaning | Impartial, unbiased | Not interested, indifferent |
| Example | 'We need a disinterested adviser.' | 'He seemed uninterested in the film.' |
| Opposite | Interested (having a stake), biased | Interested (curious), engaged |
| Disputed use | As 'not interested': common, often criticised | None |
Disinterested means impartial, with nothing to gain; uninterested means not interested at all. A good referee is disinterested but not uninterested: no stake in who wins, full attention on the game. Disinterested is also used to mean 'not interested', and the use is well established, but because it is widely criticised, uninterested is the safer word for boredom.
What it really means
Disinterested and uninterested look as if they should be synonyms. Both put a negative prefix on interested. But in careful English they describe completely different people: the one with no stake, and the one with no curiosity.
Disinterested means impartial. It draws on the financial sense of interest: a share or stake, the thing you have in "a conflict of interest". A disinterested adviser gains nothing whichever way you decide, which is exactly why you'd want one. A disinterested observer, a disinterested panel, disinterested advice: all are valued for their lack of bias, not their lack of attention.
Uninterested means not interested: bored, indifferent, unmoved. A toddler shown a spreadsheet is uninterested.
The complication is that disinterested is very often used to mean uninterested, and Dictionary.com notes that both senses are well established and that the two words have even swapped meanings over their history. But it remains a favourite target of usage critics, and learner's dictionaries label the "not interested" sense informal. So the practical rule is to write uninterested when you mean bored, and keep disinterested for impartial, where no other single word does the job as well.
Memory trick. Think of a referee. The best ones are dis-interested (no side to win) and never un-interested (eyes on every move). Dis removes the stake; un removes the attention.
In real life
- Right: The dispute went to a disinterested panel of experts. (no stake in the outcome)
- Right: The cat was completely uninterested in its new toy. (bored)
- Risky: The students looked disinterested in the lecture. (many readers will object; 'uninterested' says what you mean)
Questions
Q01What is the difference between disinterested and uninterested?
Disinterested means impartial: having no personal stake ('a disinterested witness'). Uninterested means not interested ('uninterested in sport'). A disinterested person can still care a great deal about getting things right.
Q02Is it wrong to use disinterested to mean not interested?
It's common and well established, but it's also widely criticised. Oxford Learner's Dictionaries labels it informal and notes it is thought to be incorrect. To avoid distracting readers, use uninterested for boredom.
Q03Why does disinterested mean impartial?
It comes from the sense of interest that means a share or stake in something, as in 'a conflict of interest'. To be dis-interested is to have no stake, which is why it means unbiased rather than bored.
Sources
- Disinterested vs. Uninterested — Dictionary.com.
- disinterested (adjective), with usage note — Oxford Learner's Dictionaries.
- uninterested (adjective) — Oxford Learner's Dictionaries.