1. (a.) Simple; unadorned; sour; astringent; rough to the state; having acerbity; as, an austere crab apple; an austere instructor.

2. (a.) Severe in modes of judging, or living, or acting; rigid; rigorous; stern; as, an austere man, look, life.

3. (a.) Unadorned; unembellished; severely simple.