bye-bye /ˈbaɪˌbaɪ/ interjection Learner's definition of BYE-BYE
informal
: 1goodbye —
often used by children or when speaking to children常用于儿童语言或与儿童的对话
go bye-bye
informal 1
or British go bye-byes : to go to bed上床睡觉 —
used when speaking to children用于与儿童的对话 2
US : to go away走开;离开 —
used in imitation of children's speech用于模仿儿童语言