agatePronunciation: /ˈagət/Definition of agate noun [mass noun] an ornamental stone consisting of a hard variety of chalcedony (quartz), typically banded in appearance. [count noun] a coloured toy marble resembling a banded gemstone. Origin: late 15th century: from French, via Latin from Greek akhatēsagate in other Oxford dictionaries Definition of agate in the US English dictionary
