Writing tip #18: Frequently misused word: disinterested

Contrary to popular belief, disinterested does not mean bored or uninterested. It means impartial, or not having an interest – where the word ‘interest’ refers to a benefit or advantage. Think of ‘disinterested’ as not having a vested interest, or not having something to gain.

Here’s a thought that may help: You would expect a judge to be disinterested but not uninterested in your case.
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But language evolves, you might protest – and yes; you’d be right. Pretty soon no one will remember that ‘disinterested’ once meant impartial. But now you know, and you can decide how you want to use it. I rather like the original meaning.