What is the meaning of Hieroglyphic?

A writing system of ancient Egypt, Minoans, Maya and other civilizations, using pictorial symbols to represent individual sounds, often as a rebus.

Any symbol used in this system; a hieroglyph.

Undecipherable handwriting or secret symbol.

Of, relating to, or written with such a system of symbols.

Difficult to decipher.

Source: wiktionary.org