Us Definition
We [help us; give us the books]
(slang) United States dollar.
Origin of Us
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From Middle English us, from Old English Å«s (“us", dative personal pronoun), from Proto-Germanic *uns (“us"), from Proto-Indo-European *ne-, *nō-, *n-ge-, *n-sme- (“us"). Cognate with West Frisian us, ús (“us"), Low German us (“us"), Dutch ons (“us"), German uns (“us"), Danish os (“us"), Latin nōs (“we, us").
From Wiktionary
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Middle English from Old English ūs nes-2 in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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Derived from the similarity between the letter u and the Greek letter µ.
From Wiktionary