ringback

Longman Dictionary of Contemporary English Online朗文当代英语 5++LDOCE Online朗文 5++ring·back /ˈrɪŋbæk/ noun [uncountable] a telephone service that you can use when you call someone who is already using their telephone. The service arranges for their telephone to ring yours as soon as their line is free.

ring·back nounSyllable

ring·back

BrE

/ˈrɪŋbæk/

🔊

NAmE

/ˈrɪŋbæk/

🔊

(

also Callback™

)

noun

[uncountable

, countable]

a telephone service that you can use if you call sb and their telephone is being used, so that your telephone will ring when the line is free; a call made using this service 回铃声（电话服务）；有回铃音的电话