English UsageComparison guide
Disinterested vs. Uninterested
For precise formal writing, “disinterested” means impartial or without a personal stake; “uninterested” means not interested.
Use “disinterested” for an impartial judge or observer. Use “uninterested” for someone who does not care about or want to engage with the subject.
Key details
Disinterested Coreimpartial or without a personal stake
Termsdisinterested, uninterested
Uninterested Corenot interested
Further guidance
Core difference
Disinterested is useful when neutrality matters; uninterested directly expresses lack of interest.
Fast Test
Neutral/no stake → disinterested. Bored/not interested → uninterested.
Usage Boundary
“Disinterested” is also used by some speakers for “uninterested”; use the narrower impartial sense when precision matters.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Disinterested — Cambridge Dictionary (opens in a new tab)Cambridge University Press · Meaning of disinterested as impartial or without a personal stake
- Uninterested — Cambridge Dictionary (opens in a new tab)Cambridge University Press · Meaning of uninterested as not interested