By Mayo Clinic Staff. Erectile dysfunction â the inability to get and keep an erection firm enough for sex â is a common problem. You've likely seen advertisements for erectile dysfunction herbs or supplements to increase your sexual performance..
plate tectonics. In geology, a theory that the Earth's lithosphere (crust and upper mantle) is divided into a number of large, plate-like sections that move as distinct masses. See Notes at fault, Gondwanaland, See more at tectonic boundary.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  plate(Noun) A dish from which food is served or eaten. I filled my plate from the bountiful table. 2  plate(Noun) The contents of such a dish. I ate a plate of beans. 3  plate(Noun) A course at a meal. The meat plate was particularly tasty. 4  plate(Noun) A flat metallic object of uniform thickness.