What is the meaning of $?

money

  1. dollar
  1. peso
  2. escudo
  3. pataca

dollar

peso

escudo

pataca

cache

A substitute for the letter S, used as a symbol of money or perceived greed in business practices.

A substitute for the letter S, used as a censored or filter-avoidance spelling.

A currency sign for the dollar, peso, and pataca.

An unofficial currency sign for the escudo.

Prefix indicating a variable in some languages, such as Perl, PHP, or shell scripts.

Source: wiktionary.org