I have never heard of a "main coarse"
However, a "main course" is the principle part of a formal meal - usually the largest and most elaborate course and with the most accompaniments.
Coarse means Rough. E.G Sand paper is very coarse maybe if you roughhouse with your friends that would be an example of coarse. main definition is ROUGH
Ice off coarse.
Roast Beast
of course off course coarse horse Norse
Thor,Superman, and of coarse Darth Vader.
That is a coarse piece of sandpaper! His coarse behavior will not be tolerated.
coarse course
It is coarse-grained.
not coarse at all
coarse The farmer brushed the horse's coarse hair.
A homophone for "coarse" is "course." They sound the same but have different meanings.
Example sentence(s) - The salt is coarse ground. She has long, coarse hair.