Meaning

noun writing that resembles hieroglyphics (usually by being illegible)

noun a writing system using picture symbols; used in ancient Egypt

originFirst attested around 1598, a back-formation from hieroglyphic (1580s), from Middle French hiéroglyphique, from Late Latin hieroglyphicus, from Ancient Greek ἱερογλυφικός (hierogluphikós) (Plutarch τά ἱερογλυφικά [γράμματα] "hieroglyphic [writing]), ἱερόγλυφος (hierógluphos, “carver of hieroglyphs”) (Ptolemy), a compound of ἱερός (hierós, “sacred, holy”) and γλυφή (gluphḗ, “carved work”), a…

Etymology from Wiktionary, CC BY-SA 3.0