cork in WordNet English dictionary

1. a small float usually made of cork; attached to a fishing line
   bob  bobber  cork  bobfloat 
   
2. the plug in the mouth of a bottle (especially a wine bottle)
   cork  bottle cork 
   
3. outer bark of the cork oak; used for stoppers for bottles etc.
   cork 
   
4. (botany) outer tissue of bark; a protective layer of dead cells
   phellem  cork 
   

1. stuff with cork
   "The baseball player stuffed his bat with cork to make it lighter"
   cork 
   
2. close a bottle with a cork
   cork  cork up