marked by an uncommon quality; especially superlative or extreme of its kind; "what is so rare as a day in June"-J.R.Lowell; "a rare skill"; "an uncommon sense of humor"; "she was kind to an uncommon degree"
having low density; "rare gasses"; "lightheaded from the rarefied mountain air"
not widely distributed; "rare herbs"; "rare patches of green in the desert"
not widely known; especially valued for its uncommonness; "a rare word"; "rare books"
(of meat) cooked a short time; still red inside; "rare roast beef"
recurring only at long intervals; "a rare appearance"; "total eclipses are rare events"
inclined to a healthy reddish color often associated with outdoor life; "a ruddy complexion"; "Santa's rubicund cheeks"; "a fresh and sanguine complexion"
of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies