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sit in 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.



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phrasal verb [transitive]
Word Forms
present tense
I/you/we/theysit in on
he/she/itsits in on
present participlesitting in on
past tensesat in on
past participlesat in on
  1. sit in on something to go to a meeting or a class although you are not directly involved in it

    Do you mind if I sit in on your class this afternoon?

See also main entry: sit

Open Dictionary


the activity of exploring abandoned buildings and other manmade structures

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