Dincline Share definition Flag A term that Means less steep. Used in math to describe a line on a graph as being less steep. It can also be used in nature to describe slopes as less steep. Line A is the Dincline to Line B. Dincline by Dhincline March 20, 2020 0 0 Get merch Get the Dincline mug. Buy Now — $32.95 See more merch