graduation in WordNet English dictionary

1. an academic exercise in which diplomas are conferred
   commencement  commencement exercise  commencement ceremony  graduation  graduation exercise 
   
2. the act of arranging in grades
   gradation  graduation 
   
3. the successful completion of a program of study
   graduation 
   
4. a line (as on a vessel or ruler) that marks a measurement
   "the ruler had 16 graduations per inch"
   graduation