definition hieroglyphic
â¦ hieroglyphical. 1 of or relating to a form of writing using picture symbols, esp. as used in ancient Egypt. 2 written with hieroglyphic symbols. 3 difficult to read or decipher. n (also). â¦ hieroglyph. 4 a picture or symbol representing an object, concept, or sound. 5 a symbol or picture that is difficult to read or decipher.