N in WordNet English dictionary

1. a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues
   nitrogen  N  atomic number 7 
   
2. the cardinal compass point that is at 0 or 360 degrees
   north  due north  northward  N 
   
3. the 14th letter of the Roman alphabet
   N  n 
   
4. (of a solution) concentration expressed in gram equivalents of solute per liter
   normality  N 
   
5. a unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram; equal to 100,000 dynes
   newton  N 
   
6. the 14th letter of the Roman alphabet
   N  n