sit in
verb- To attend a class, educational presentation, meeting, etc. for one time, as a visitor.
- To take part in a group musical performance, especially a jazz session, as a temporary guest.
- To participate in a sit-in protest.
From the library
I have always held, too, that pistol practice should be distinctly an open-air pastime; and when Holmes, in one of his queer humours, would sit in an armchair with his hair-trigger and a hundred Boxer cartridges, and proceed to adorn the opposite wall with a patriotic V.
Here we sit in a branchy row,
Come now, sit in.”
I shall sit in that room and see if its atmosphere brings me inspiration.
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