sit in on

verb

To attend a private meeting or class without participating.

“Parents of younger children often become upset when they are told that they cannot sit in on the psychological assessment.”

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Meanings

verbsit in on (third-person singular simple present sits in on, present participle sitting in on, simple past and past participle sat in on)

present singular third person sits in on · participle present sitting in on · participle past sat in on · past sat in on

  1. To attend a private meeting or class without participating.

    Parents of younger children often become upset when they are told that they cannot sit in on the psychological assessment.

Cite this entry
APA

sit in on. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/sit%20in%20on

MLA

“sit in on.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sit%20in%20on. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “sit in on,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/sit%20in%20on.

Source: sit in on on Wiktionary, CC BY-SA 4.0.