1. [noun] Punctuation symbol $, used to indicate a price in dollars.
2. [noun] (programming) in certain languages (such as Perl or PHP), to indicate a variable.
3. [noun] (programming) in certain languages, used to indicate a hexadecimal constant.
4. [noun] (programming) in certain languages, used to indicate a constant.
5. [noun] (programming) in certain languages (such as BASIC), to indicate a variable or a constant containing text (a string) as opposed to a number.
6. [noun] (programming) in regular expressions, used to indicated the end of the string/line.
