Eddy/ˈedi/ Definition 1 of 2Pro Tip 1/3Natural Phenomena Used to describe movements in nature, like rivers or tornadoes. The leaves danced in a small eddy as the breeze passed. Pro Tip 2/3Water Bodies Commonly found around obstacles in streams or behind boats. Fishermen noticed an eddy formed behind the river boulder. Pro Tip 3/3Subtle Movement Refers to a smaller or gentler movement than a whirlpool or vortex. An eddy in the glass's condensation traced a delicate path.