Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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-'s1 shortened form of "us".
-'s2 used to form the possessive of most singular nouns, some plural nouns not ending in "s," some pronouns, and various noun phrases.
-'s3 shortened form of "is". [3 definitions]
-s1 used to form the third person sing. present tense of all regular and most irregular verbs.
-s2 used to form the regular plural of most nouns.
s the nineteenth letter of the English alphabet. [4 definitions]
S1 abbreviation of "south."
S2 symbol of the chemical element sulfur.
S3 abbreviation of "small."