junior in WordNet English dictionary

1. the younger of two persons
   "she is two years my junior"
   junior 
   
2. a third-year undergraduate
   junior 
   
3. term of address for a disrespectful and annoying male
   "look here, junior, it's none of your business"
   junior 
   

1. younger; lower in rank; shorter in length of tenure or service
   junior 
   
2. used of the third or next to final year in United States high school or college
   "the junior class"; "a third-year student"
   junior  third-year  next-to-last 
   
3. including or intended for youthful persons
   "a junior sports league"; "junior fashions"
   junior