(historical, military, Ancient Greece) A type of lightly armoured foot soldier equipped with an aspis (shield) and spear.
1988 [CUP], A. B. Bosworth, Conquest and Empire: The Reign of Alexander the Great, Cambridge University Press (Canto), 1993, page 259,
The other major component of the Macedonian infantry was the corps of hypaspists. This force had evolved from the old bodyguard of the Macedonian kings and its nucleus, the agema, still acted as Alexander's guard when he fought on foot. The rest of the hypaspists were organised in chiliarchies (units of 1,000), perhaps three in number.
2013, Michael Taylor, Antiochus the Great, Pen & Sword Books (Pen & Sword Military), unnumbered page,
Perhaps fearful of blame in the event of failure, Lagoras asked that two of the King's favourites join the assault, Theodotus the Aetolian and Dionysius, the commander of the hypaspists, an elite subset of the Silver Shields.