American Dictionary

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Definition wait up in American English

wait up phrasal verb

[intransitive] phrasal verb
1

to not go to sleep until someone comes home

Example

Don't wait up for me, I'll be very late tonight.

Synonyms and related words
2

used for asking or telling someone to stop so that you can speak or walk with them

Example

Sharon, just wait up a second please.

Definition wait up in American English