What does "host [something]" mean?
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Native speaker’s answer
Rebecca
To "host [something]," more specifically, to "host [an event]" means to entertain or manage an event- the host is the individual or group inviting and entertaining individuals at an event. Here, they're talking about the U.S "hosting" the winter Olympics, which means they organised the event and invited the other countries to attend. One can also "host" a TV show. The host is usually the TV show interviewer or speaker. Ex: We're hosting a dinner party at our house this weekend! You should come. Ex: Japan hosted the Olympics in 2021. Ex: The show's host isn't very good at interviewing people.