1 : the most common form of the plague in humans; characterized by chills, prostration, delirium and the formation of buboes in the armpits and groin; does not spread from person to person
2 : any large scale calamity (especially when thought to be sent by God)
3 : a swarm of insects that attack plants
4 : a padded gymnastic apparatus on legs
5 : a chessman shaped to resemble the head of a horse; can move two squares horizontally and one vertically (or vice versa)