1
: written in, constituting, or belonging to a system of writing mainly in pictorial characters
2
: inscribed with hieroglyphic
3
: resembling hieroglyphic in difficulty of decipherment
2
: a system of hieroglyphic writing
specifically
: the picture script of the ancient Egyptian priesthood
—often used in plural but singular or plural in construction
3
: something that resembles a hieroglyph especially in difficulty of decipherment
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Merriam-Webster unabridged
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