1An affectionate suffix attached after a name (often for children, close friends, or pets) expressing closeness or endearment; not used with superiors or in formal contexts.
太郎ちゃんは幼稚園で人気者だ。
Taro-chan is popular at kindergarten.
犬のポチちゃんが庭で遊んでいる。
Our dog Pochi-chan is playing in the yard.
友達同士では名前に「ちゃん」を付けて呼ぶことが多い。
Close friends often address each other by adding -chan to their names.
上司を『ちゃん』付けで呼ぶのは失礼だ。
It's rude to address your boss with -chan.