Freebase(0.00 / 0 votes)Rate this definition: Tongue. The tongue is a muscular hydrostat on the floors of the mouths of most vertebrates which manipulates food for mastication. It is the primary organ of taste, as much of the upper surface of the tongue is covered in papillae and taste buds.
1. eugenics-the study of methods of improving genetic qualities by selective breeding (especially as applied to human mating). bioscience, life science-any of the branches of natural science dealing with the structure and behavior of living organisms.
The definition of edgy is having sharp or pointed corners, or being irritable, or being unconventional. 1  An example of something edgy is a metal table. 2  An example of an edgy person is someone who is constantly annoyed. 3  An example of an edgy person is someone with multiple tattoos and dozens of piercings.