adjectives
not widely known; especially valued for its uncommonness
"a rare word"; "rare books"
is similar to
not common or ordinarily encountered; unusually great in amount or remarkable in character or kind
"uncommon birds"; "frost and floods are uncommon during these months"; "doing an uncommon amount of business"; "an uncommon liking for money"; "he owed his greatest debt to his mother's uncommon character and ability"
recurring only at long intervals
"a rare appearance"; "total eclipses are rare events"
is similar to
not frequent; not occurring regularly or at short intervals
"infrequent outbursts of temper"
not widely distributed
"rare herbs"; "rare patches of green in the desert"
is similar to
deficient in quantity or number compared with the demand
"fresh vegetables were scarce during the drought"
having low density
"rare gasses"; "lightheaded from the rarefied mountain air"
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"
(of meat) cooked a short time; still red inside
"rare roast beef"
is similar to
not treated with heat to prepare it for eating