rude; (of persons) so unrefined as to be lacking in discrimination and sensibility
Crass in a sentence
His crass behavior offended everyone at the party.
Synonyms for crass
rude
vulgar
uncouth
Antonyms for crass
refined
gracious
cultured
Practice crass on real SAT questions
Vocabulary like crass appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.