Cōarse, a.
a. [compar. COARSER; superl. COARSEST.] [As this word was anciently written course, or cours, it may be an abbreviation of of course, in the common manner of proceeding, common, and hence, homely, made for common domestic use, plain, rude, rough, gross, e. g., “Though the threads be course.” Gascogne.]
Sense 1. Large in bulk, or composed of large parts or particles; gross; thick; rough; as, coarse sand; coarse hair; coarse thread; coarse cloth; coarse bread.
Sense 2. Not refined or nice; rough; rude; unpolished; gross; indelicate; mean; as, coarse manners; coarse language.
Coarse complexions And cheeks of sorry grain. Milton.
I feel Of what coarse metal ye are molded. Shak.
To copy, in my coarse English, his beautiful expressions. Dryden.