rare /ˈrær, ˈrɛr/
  (a.)稀罕的,罕有的,珍貴的,稀薄的,半熟的,非常的(ad.)非常
  rare
  稀 稀少
  Rare a.  Early. [Obs.]
  Rude mechanicals that rare and late
  Work in the market place.   --Chapman.
  Rare, a. [Compar. Rarer superl. Rarest.]  Nearly raw; partially cooked; not thoroughly cooked; underdone; as, rare beef or mutton.
  New-laid eggs, which Baucis' busy care
  Turned by a gentle fire, and roasted rare.   --Dryden.
  Note: ☞ This word is in common use in the United States, but in England its synonym underdone is preferred.
  Rare, a. [Compar. Rarer superl. Rarest.]
  1. Not frequent; seldom met with or occurring; unusual; as, a rare event.
  2. Of an uncommon nature; unusually excellent; valuable to a degree seldom found.
     Rare work, all filled with terror and delight.   --Cowley.
     Above the rest I judge one beauty rare.   --Dryden.
  3. Thinly scattered; dispersed.
     Those rare and solitary, these in flocks.   --Milton.
  4. Characterized by wide separation of parts; of loose texture; not thick or dense; thin; as, a rare atmosphere at high elevations.
     Water is nineteen times lighter, and by consequence nineteen times rarer, than gold.   --Sir I. Newton.
  Syn: -- Scarce; infrequent; unusual; uncommon; singular; extraordinary; incomparable.
  Usage: -- Rare, Scarce. We call a thing rare when but few examples, specimens, or instances of it are ever to be met with; as, a rare plant. We speak of a thing as scarce, which, though usually abundant, is for the time being to be had only in diminished quantities; as, a bad harvest makes corn scarce.
     A perfect union of wit and judgment is one of the rarest things in the world.   --Burke.
     When any particular piece of money grew very scarce, it was often recoined by a succeeding emperor.   --Addison.
  ◄ ►
  rare
       adj 1: not widely known; especially valued for its uncommonness; "a
              rare word"; "rare books"
       2: recurring only at long intervals; "a rare appearance";
          "total eclipses are rare events"
       3: not widely distributed; "rare herbs"; "rare patches of gree
          in the desert"
       4: 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" [syn: uncommon]
       5: having low density; "rare gasses"; "lightheaded from the
          rarefied mountain air" [syn: rarefied, rarified]
       6: (of meat) cooked a short time; still red inside; "rare roast
          beef"