Definition of "sit in" []

• To attend something for one time, as a visitor. (verb)

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• "Ironically the Tim-3 gene turns out to sit in a location where no scientist would ever have dreamed to look: smack on the chromosome that determines certain types of allergic reactions."
• "But it is flattering that Boris dives deep into the sea to bring me conch shells and necks of two-thousand-year-old amphoras, which should sit in museums instead of the pockets of my backpack."
• "Grisha invites us to sit in armchairs as he produces a small key out of the top drawer of his desk."