Rare Books

adjective Rare is used to describe something that is uncommon, unusual, or infrequent.

• The gemstone found in the mine is incredibly rare and valuable.
• It's pretty rare to see a shooting star in the night sky.
• Finding a vintage vinyl record in mint condition is like striking gold, it's so rare!
• His kindness and generosity are as rare as a blue moon.

noun books, pamphlets, or broadsides that were printed before the year 1501

• The library's collection includes rare incunabula dating back to the 15th century.
• I found some really old books, like incunabula, at the antique store.
• Check out these ancient incunabula books I scored at the thrift shop!
• The discovery of the ancient manuscript was like finding literary incunabula.