资料来源 : Webster's Revised Unabridged Dictionary (1913)

Rub \Rub\, n. [Cf. W. rhwb. See Rub, v,t,]
   1. The act of rubbing; friction.

   2. That which rubs; that which tends to hinder or obstruct
      motion or progress; hindrance; obstruction, an impediment;
      especially, a difficulty or obstruction hard to overcome;
      a pinch.

            Every rub is smoothed on our way.     --Shak.

            To sleep, perchance to dream; ay, there's the rub.
                                                  --Shak.

            Upon this rub, the English ambassadors thought fit
            to demur.                             --Hayward.

            One knows not, certainly, what other rubs might have
            been ordained for us by a wise Providence. --W.
                                                  Besant.

   3. Inequality of surface, as of the ground in the game of
      bowls; unevenness. --Shak.

   4. Something grating to the feelings; sarcasm; joke; as, a
      hard rub.

   5. Imperfection; failing; fault. [Obs.] --Beau. & Fl.

   6. A chance. [Obs.]

            Flight shall leave no Greek a rub.    --Chapman.

   7. A stone, commonly flat, used to sharpen cutting tools; a
      whetstone; -- called also {rubstone}.

   {Rub iron}, an iron guard on a wagon body, against which a
      wheel rubs when cramped too much.