terminology question

Okay, I'm an uncultured swine. Now that I've admitted it, could
someone tell me when I should use the following terms?

Slacks.

Trousers.

Pant.

Pants.

I feel very uncultured when I hear someone refer to "a pant" because I
always say "pants". I just assume I'm wrong. :)

Trousers I grew up thinking as men's pants. Maybe nicer than everyday
pants. Trousers had a jacket that matched them. Or something like
that.

Slacks were also something I thought of as menswear, but then I saw it
used for women's pan-, er, bottoms and so was unsure again. I thought
of slacks are something that could grow up to be trousers if they
married a suit jacket.

I looked on web-search but mainly saw UK versus US word usage.

ahmward...

I usually say slacks. IMO trousers are cuffed the way they are on my
husband's suits. I have a few pairs of trousers, but basically I wear
slacks when I am not wearing jeans. I use the term pants but prefer
slacks.

Barbara...

*Pants* (and I do prefer the plural usage, which I believe to be
correct) are any form of two-legged, full length garments (YKWIM).
That's the term I generally use.

Trousers are a specific form of tailored pants. Trousers include the
pants that are part of a suit as well as pants that are worn with a
blazer or sports coat, but are not limited to those. For example,
trousers might have a crease down the front, and slit (not patch)
pockets in the back.

Slacks are more casual, and include those awful double-knit things from
the 60s.