Britannica Dictionary definition of US
1
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used to refer to the speaker and another person or group of people as the indirect object or direct object of a verb
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It was nice of you to invite us.
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It's fine with us if you want to bring a friend.
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There's nobody in here but us kids.
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Someone please help us!
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It's just the two of us for dinner.
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They told us it would be a few minutes, so why don't we all wait outside?
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All of us [=we all] will be affected by these changes.
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It's an exciting time for all of us.