Pronunciation: (&thslash;em; unstressed &thslash;um, um),[key] —pron. 1. the objective case of they, used as a direct or indirect object: We saw them yesterday. I gave them the books. 2. Informal.(used instead of the pronoun they in the predicate after the verb to be): It's them, across the street. It isn't them. 3. Informal.(used instead of the pronoun their before a gerund): The boys' parents objected to them hiking without adult supervision.
—adj. Nonstandard.those: He don't want them books.