bob in WordNet English dictionary

1. a short abrupt inclination (as of the head)
   "he gave me a short bob of acknowledgement"
   bob 
   
2. a short or shortened tail of certain animals
   bobtail  bob  dock 
   
3. a small float usually made of cork; attached to a fishing line
   bob  bobber  cork  bobfloat 
   
4. a hanging weight, especially a metal ball on a string
   bob 
   
5. a long racing sled (for 2 or more people) with a steering mechanism
   bobsled  bobsleigh  bob 
   
6. a hair style for women and children; a short haircut all around
   bob 
   
7. a former monetary unit in Great Britain
   British shilling  shilling  bob 
   

1. cut hair in the style of a bob
   "Bernice bobs her hair these days!"
   bob 
   
2. make a curtsy; usually done only by girls and women; as a sign of respect
   "She curtsied when she shook the Queen's hand"
   curtsy  bob 
   
3. remove or shorten the tail of an animal
   dock  tail  bob 
   
4. move up and down repeatedly
   "her rucksack bobbed gently on her back"
   bob 
   
5. ride a bobsled
   "The boys bobbed down the hill screaming with pleasure"
   bobsled  bob