Nether/ˈneðər/ Definition 1 of 2Pro Tip 1/3Spatial Use Used to describe the bottom part of a structured space. Workmen had to access the nether part of the bridge for repairs. Pro Tip 2/3Figurative Sense May imply an area that is hidden or not often seen by people. He searched for old tools in the nether depths of his grandfather's shed. Pro Tip 3/3Anatomy Reference Sometimes refers humorously or euphemistically to the lower part of the body. He injured his nether regions during the bike race.