Keep
Keep verb - To mark with an appropriate practice, rite, or ceremony.
Sit in
Sit in verb - Attend as a visitor.
Both terms in one sentence
- In Keep Calman Carry On, Susan Calman explains why her wife can sit in silence while she needs a TV or radio on in every room of the house.
Source: This Is Wrong on So Many Levels -
In an episode where he apparently dies (he actually staged his own death) Quark holds a memorial service in the bar and grabs a random patron to sit in Morn's chair to 'keep it warm'...a random patron played by Mark Allen Shepherd.
Source: You Look Familiar
Cite this Source
Sit in and Keep. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/keep/sit_in
Keep & Sit in. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/keep/sit_in>.
Sit in or Keep. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/keep/sit_in.
Google Ngram Viewer shows how "keep" and "sit in" have occurred on timeline