sit in

== English == === Pronunciation === === Verb === sit in (third-person singular simple present sits in, present participle sitting in, simple past and past participle sat in) (idiomatic) To attend a class, educational presentation, meeting, etc. for one time, as a visitor. (music) To take part in a group musical performance, especially a jazz session, as a temporary guest. To participate in a sit-in protest. ==== Translations ==== ==== See also ==== opt in === Anagrams === INSTI, Sinti, inits, intis