Boron Share definition Flag 1. an element. Atomic Mass 5 on the periodic table. A non metal. 2. A boorish moron. ~ Boron is classified as a non-metal and has 5 protons and 5 electrons. ~ You are by far the biggest Boron on the face of this earth. Boron by Dan.D. March 30, 2009 0 0 Get merch Get the Boron mug. Buy Now — $32.95 See more merch