Emily Dickinson Lexicon

COARSE, a. [This word may be allied to gross, and the Latin crassus, for similar transpositions of letters are not uncommon.]

1. Thick; large or gross in bulk; comparatively of large diameter; as, coarse thread or yarn; coarse hair; coarse sand. This seems to be the primary sense of the word; opposed to fine or slender. Hence,
2. Thick; rough; or made of coarse thread or yarn; as, coarse cloth.
3. Not refined; not separated from grosser particles, or impurities; as, coarse metal; coarse glass. – Shak.
4. Rude; rough; unrefined; uncivil; as, coarse manners.
5. Gross; not delicate. The coarser tie of human law. – Thomson.
6. Rude; rough; unpolished; inelegant; applied to language. – Dryden.
7. Not nicely expert; not accomplished by art or education; as, a coarse practitioner. – Arbuthnot.
8. Mean; not nice; not refined or elegant; as, a coarse perfume; a coarse diet.