herm \ˈhərm\noun (-s) Etymology: Latin herma, hermes, from Greek hermēs statue of Hermes, herm, from Hermēs, messenger of the gods : a statue in the form of a square stone pillar surmounted by a bust or head < a herm of Themistocles which has been identified by its inscription — New Internat'l Year Book > especially: a pillar surmounted by a usually bearded head of Hermes — compare term