My Webster's also says that a pump is a low shoe without laces or straps.

Yet, when I buy low shoes without laces or straps, I call them loafers and the store clerks seem to know what I mean. If I asked for pumps they'd probably send me to the ladies' shoes department.

So while a "loafer" might be a type of pump, a "pump" is not a loafer. Likewise, a kilt might be a type of skirt, but a "skirt" is not a kilt.

Words mean what people want them to mean.

In the society I live in, this is what people think these words mean:

Loafer:
http://www.zappos.com/n/es/d/722000050.html
Pump:
http://couture.zappos.com/n/es/d/722118709.html
Skirt:
http://www.spiegel.com/shop/thumbnai...tegory_id=1183
Kilt:
http://www.hector-russell.com/kilts1.html

I used Google and did a search on each of the words and used a representative sample of what the search turned up.

I'm also aware that there a people who, for personal, political, or philosophical reasons want to blur or eliminate such distinctions.

Maybe someday I'll be convinced that they're right.