[drag.on] n [ME, fr. OF, fr. L dracon-, draco serpent, dragon, fr. Gk drakon serpent; akin to OE torht bright, Gk derkesthai to see, look at] (13c) 1 archaic: a huge serpent
2: a mythical animal usu. represented as a monstrous winged and scaly serpent or saurian with a crested head and enormous claws
3: a violent, combative, or very strict person
4. cap: draco
5: something or someone formidable or baneful -- drag.on.ish adj