dollar sign

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The symbol ($), used mainly to indicate a dollar amount.

Wiktionary

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

WordNet 3.0

1. n. a symbol of commercialism or greed
2. n. a mark ($) written before a number to indicate that it stands for the number of dollars