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\ same as -'s \
Definition of 's
(Entry 1 of 3)
's
pronoun\ s \
Definition of 's (Entry 2 of 3)
: us —used with letlet's
-'s
noun suffix or pronoun suffix\ s, after voiceless consonants other than s, sh, ch; z, after vowels and voiced consonants other than z, zh, j; əz, after s, sh, ch, z, zh, j \
Definition of -'s (Entry 3 of 3)
—used to form the possessive of singular nounsboy's , of plural nouns not ending in schildren's , of some pronounsanyone's , and of word groups functioning as nounsthe man in the corner's hat or pronounssomeone else's
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Merriam-Webster unabridgedWords at Play
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Time Traveler for 's
The first known use of 's was in 1584
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