(

(

1. Represents a mouth vertically aligned, in order to form emoticons.
2. Used in ( ).

(

1. (mathematics) Denotes an open endpoint of an interval.

   ${\displaystyle (a,b]=\{x\in \mathbb {R} \,|\,a<x\leq b\}}$ 

For quotations using this term, see Citations:(.

• ]

• to (Lojban)

Punctuation

(

1. used in ( )
2. (Internet slang, by extension) Added to the end of a message, either left parenthesis only or both, used in place of ellipses …… (which can be read as indecisiveness) to imply an abrupt and intentional end to an incomplete sentence.

   確實如此，然而（

   I mean that's true, but (you know

(

1. Used in ( ).