Meaning of icon

i•con

1. a picture, image, or other representation.
2. a representation of some sacred personage, as Christ or a saint or angel, painted usually on a wood surface and venerated itself as sacred.
3. a sign or representation that stands for its object by virtue of a resemblance or analogy to it.
4. a picture or symbol that appears on a monitor and is used to represent a command, as a file drawer to represent filing.
5. a sign or representation that stands for its object by virtue of a resemblance or analogy to it.