rare

a.

  1. Early.

superl.

  1. Nearly raw; partially cooked; not thoroughly cooked; underdone; as, rare beef or mutton.
  2. Not frequent; seldom met with or occurring; unusual; as, a rare event.
  3. Of an uncommon nature; unusually excellent; valuable to a degree seldom found.
  4. Thinly scattered; dispersed.
  5. Characterized by wide separation of parts; of loose texture; not thick or dense; thin; as, a rare atmosphere at high elevations.