(on pronouns) Possessive marker, indicating that an object belongs to the word bearing the marker. / (on nouns, now nonstandard) Alternative form of -'s

(informal, colloquial, sometimes humorous) Hypocoristic suffix

Contraction of is. / Contraction of has. / (proscribed, dialectal, Southern US) Contraction of was.

Contraction of us (found in the formula let’s which is used to form first-person plural imperatives).

(poetic) Contraction of his.

(UK, dialect) Contraction of as (when it is (nonstandardly) used as a relative conjunction, or like a relative pronoun, meaning "that").

(UK, dialect) Contraction of as.

(physics) subatomic particles with a spin (quantum angular momentum) of 0, predicted by supersymmetry; the bosonic equivalent of known fermions

(organic chemistry) secondary form

The nineteenth letter of the English alphabet, called ess and written in the Latin script.