classmate:
(also ‘class fellow‘; plural: ‘classmates‘; pronunciation: the letter ‘c’ is said with a ‘k’ sound as in “king”)
a boy or girl (a man or woman) of the same class sitting and studying in the same classroom in a school or college, or in any educational institution,
classmates in a classroom
It is always exciting to see one’s classmate some ten or fifteen years later!
There are several stories in which one student sacrifices his time and money for his/her classmate.
We watch news on TV about how a poor student gets through her college degree with the help her loving classmates.
The best way all the classmates of a certain year keep in regular touch is to form an alumni association and keep exchanging greetings on birthdays and meeting once a year on a special occasion.
