Der (mannlich or masculine), die (weiblich or feminine), and das (sachlich or neutral) more or less describes the sex (gender) of the item. We just use "the" for everything: the car, the highway, the table, the ball.
Wienerschnitzel: Wien (not to get confused with wein or wine) - means the city of Vienna (Austria - just remember there are no kangaroos in Austria), the "er" at the end indicates "something" or "someone" masculine coming from that city, area or region. Schnitt means to cut, schnitzel means a small, thinly cut piece of (usually) pork. So what we are left with is what we call a veal cutlet, or what we call in the midwest a breadeed pork tenderloin. You can also oder these "natur" (natural) meaning without breading.
Adding "Art" to the word like "Schnitzel "Weiner Art"' means a pork cutlet cooked in the style that they cook it in Vienna. It is basically a plain breaded tenderloin without any gravy usually accompanied with "pomme frites" or fried potatoes, or as we say "french fries". Which leads me to they are not "french fries", but "frenched fries" and then shortened by us Ami's (Americans). "Frenching" is a style of cut. Another example would be a can of french cut green beans. They are long slices.
Now when it comes to gravies...they change the whole subject...dang I'm getting hungry. I'm sure glad my wife can cook all this!
Wiener Wurst is simply sausage made in the style that they make it in Vienna.
Which leads me to "Bratwurst". To Ami's they are fried or grilled sausages. We've shortened them to "brats" which just means "fried" or "grilled". A foreigner would ask hm/herself a fried or grilled "what"? That's why you say "bratwurst" for single and plural.
End of lesson. Hefe Weizens on me!!