"junior" in the noun sense
1. junior
term of address for a disrespectful and annoying male
"look here, junior, it's none of your business"
2. junior
a third-year undergraduate
3. junior
the younger of two persons
"she is two years my junior"
4. Junior, Jr, Jnr
a son who has the same first name as his father
"junior" in the adjective sense
1. junior
younger lower in rank shorter in length of tenure or service
2. junior, third-year, next-to-last
used of the third or next to final year in United States high school or college
"the junior class"
"a third-year student"
3. junior
including or intended for youthful persons
"a junior sports league"
"junior fashions"
Source: WordNet® (An amazing lexical database of English)
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