class·mate 
/ˈklæsˌmeɪt, Brit ˈklɑ:sˌmeɪt/ noun
plural class·mates /ˈklæsˌmeɪt, Brit ˈklɑ:sˌmeɪt/ noun [count] : a member of the same class in a school, college, or university ◊Classmate can refer to someone who is taking the same class as you or to someone who will graduate from your school or college in the same year as you.
▪ We were classmates in high school. ▪ She invited all of her classmates to her birthday party.
▪ We were classmates in high school. ▪ She invited all of her classmates to her birthday party.
