Circumflex

[Couch Potatoe]

A wave of the voice embracing both a rise and fall or a
fall and a rise on the same a syllable.

[Dave Paprocki]

[See] [definition] for ^.

[Jason Yan]

A quick note response used in internet [chats] (mostly in MMOs) in response to a post that the user finds to be most [relatable] or correct in context to the [topic] at hand.

[Kai]

A mark (^) placed over a vowel in some languages to indicate contraction, length, or a particular quality.