I know that’s what it originally meant, but we don’t really need a specific word for destroying ten percent of something any more. (I do think we needed ‘awesome’, but alas, that’s been diluted.)
I find it a useful term to use for something that’s been suddenly drastically reduced, but not entirely destroyed.
I see people complaining about its use on the net so often (and they invariably point to the original definition, of a punishment inflicted on a Roman legion) I thought everyone knew where it came from.
Which, now that I think about it, is obviously not a very smart thing for me to think, because otherwise why are people complaining about its improper use?
You’re totally right. The word has morphed into a similar but different meaning. I am not OCD about most things, but some times some little stupid thing will bug the hell out of me. On more than one occasion I have found myself deleting “decimate” from something I wrote and used something else.
And technically, I am correct. The best kind of correct!