<p><strong>Pronoun:</strong></p><ul><li><p>A form of the possessive case of plural <em>they</em> used as a predicate adjective, after a noun or without a noun:</p><ul><li>Example: "Oh, you know Walt and Liz—are you a friend of theirs?"</li><li>Example: "It is theirs."</li></ul></li><li><p>A form of the possessive case of singular <em>they</em> used as a predicate adjective, after a noun or without a noun:</p><ul><li><p>(Used to refer to a generic or unspecified person previously mentioned, about to be mentioned, or present in the immediate context):</p><ul><li>Example: "I have my book—does everyone else have theirs?"</li></ul></li><li><p>(Used to refer to a specific or known person previously mentioned, about to be mentioned, or present in the immediate context):</p><ul><li>Example: "The child couldn’t say whether or not the coat was theirs."</li></ul></li><li><p>(Used to refer to a nonbinary or gender-nonconforming person previously mentioned, about to be mentioned, or present in the immediate context):</p><ul><li>Example: "I've already gotten my coffee, but Morgan is still waiting to get theirs."</li></ul></li></ul></li><li><p>That which belongs to them:</p><ul><li>Example: "The Joneses don't usually flaunt their money, but theirs is the largest house on the block."</li></ul></li></ul>