commencement

1 ENTRIES FOUND:
commencement /kəˈmɛnsmənt/ noun
plural commencements
commencement
/kəˈmɛnsmənt/
noun
plural commencements
Britannica Dictionary definition of COMMENCEMENT
formal
1 
[noncount] : the time when something begins : beginning — usually + of
2 
US : a ceremony during which degrees or diplomas are given to students who have graduated from a school or college
[noncount]
[count]
— often used before another noun