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check up on - definition and synonyms


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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

phrasal verb [transitive]
Word Forms
present tense
I/you/we/theycheck up on
he/she/itchecks up on
present participlechecking up on
past tensechecked up on
past participlechecked up on
  1. check up on someone to find out information about someone, especially secretly

    Ken told me someone had been checking up on me.

    Are you checking up on me again?

See also main entry: check

sea lion

in an online conversation, repeatedly asking a person questions which suggest that you are interested in what they are talking about, but are actually intended to annoy them

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Open Dictionary


an electric skateboard

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