The skull is one of man's oldest and most powerful symbols. It has a long and varied history of use with multiple overlapping interpretations. Most commonly it is seen as a representation of death and mortality, but it has many other uses including:
To invoke fear or caution.
To celebrate the memory of the dead.
To celebrate life.
As a symbol of vanity.
As a symbol of life after death.
As a symbol of change.
As a means of obtaining good luck or avoiding bad luck.
As a symbol of toughness, machismo, courage, bravery or indifference to death and danger.
As a symbol of nonconformity, free-thinking, and rebelliousness.
For cute appeal and fashion.
As pure decoration.
Skull symbolism is the attachment of symbolic meaning to the human skull. The most common symbolic use of the skull is a representation of death and mortality. Humans can often recognize the buried fragments of an only partially revealed cranium even when other bones may look like shards of stone.