同い年 (onaidoshi) Japanese meaning: the same age | KotomoraHe and I are the same age.
I have many friends who are the same age as me.
Usage patterns
〈人〉と同い年to be the same age as someone
He is the same age as me.
同い年の〈人〉a person who is the same age
I have a lot of friends who are the same age as me.
同い年ぐらいabout the same age
I think the kid next door is about the same age as me.