All 4 Uses

ogre
in
The House of Hades
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The line of javelins chewed through the enemy like a set of giant teeth, felling ogres and snake women and hellhounds.†
p. 510.4 *
He crouched, and Annabeth vaulted over him, bringing her sword down on the head of a heavily tattooed ogre.†
p. 522.2
It shifted its hundred-foot-long body, flicking its dappled green tail and wiping out a battalion of ogres.†
p. 524.8
She had one last glimpse of the Maeonian drakon shaking an ogre like a sock puppet, Damasen jabbing at Tartarus's legs.†
p. 528.4

Definitions:

(1) (ogre)
a frightening giant from fairy tales, especially one who eats people; or a cruel or terrifying person
(2) (meaning too rare to warrant focus)