rub

verb7

1. •
   to move one thing firmly over another, keeping them pressed together

   • I rubbed the cloth over the glass.
   • The cat rubbed itself against my leg.
2. •
   To be rubbed against something.

   • My shoes are beginning to rub.
3. •
   To scour; to burnish; to polish; to brighten; to cleanse; often with up or over.

   • The whole business of our redemption is, in short, only to rub over the defaced copy of the creation — 1716
4. •
   To spread a substance thinly over; to smear.

   • meat rubbed with spices before barbecuing
5. •
   (old-fashioned) To move or pass with difficulty.

   • to rub through woods, as huntsmen
6. •
   To hinder; to cross; to thwart.

   • 'Tis the duke's pleasure, / Whose disposition, all the world well knows, / Will not be rubbed nor stopped. — 1603
7. •
   To touch the jack with the bowl.

noun7

1. •
   An act of rubbing.

   • Give that lamp a good rub and see if any genies come out.
2. •
   A difficulty or problem.

   • To die, to sleep— / To sleep—perchance to dream. Ay, there's the rub! / For in that sleep of death what dreams may come, / When we have shuffled off this mortal coil, / Must give us pause — 1599
3. •
   In the game of crown green bowls, any obstacle by which a bowl is diverted from its normal course.
4. •
   Any substance designed to be applied by rubbing.

   • a heat rub intended for muscular strains
5. •
   A mixture of spices applied to meat before it is barbecued.
6. •
   (UK, slang) A loan.
7. •
   (no longer used) A quip or sarcastic remark.

noun2

1. •
   Any of a group of proteins similar to ubiquitin
2. •
   Initialism of rich urban biker.