n.
    - oneself.
 - a person or thing that is foremost in an activity or area.
 - euphemistic urine.
 - a first lieutenant in the navy.
 
adj.
 most important; foremost.
 
  Phrase
  
    
      - number one 
(or number two, etc.)
 the shortest (or next shortest, etc.) man's cropped haircut produced with electric hair clippers.