Definitions:

1. Abbreviation for 'North' and 'Northern'. ABBREVIATION
   • The point 'N' which is the center of the parallel forces, is called the north or positive pole of the magnet.
2. Abbreviation for the chemical element 'Nitrogen'. ABBREVIATION
   • Nitrogen, N, combines with hydrogen to form ammonia, NH3.
3. The 14th letter of the English alphabet. NOUN
4. Used in mathematics to mean a number whose value is not known or not stated. NOUN
   • If 3n=12, what is the value of 'n'?.
5. Used in writing to mean 'and'. CONJUNCTION
   • He likes to listen to rock 'n' roll music.

Synonyms:

• nitrogen
• north
• northern