Meaning : Not widely known. Especially valued for its uncommonness.
Example :
A rare word.
Rare books.
Meaning : Recurring only at long intervals.
Example :
A rare appearance.
Total eclipses are rare events.
Meaning : Not widely distributed.
Example :
Rare herbs.
Rare patches of green in the desert.
Meaning : Marked by an uncommon quality. Especially superlative or extreme of its kind.
Example :
What is so rare as a day in June.
A rare skill.
An uncommon sense of humor.
She was kind to an uncommon degree.
Synonyms : uncommon
Meaning : (of meat) cooked a short time. Still red inside.
Example :
Rare roast beef.