taning Share definition Flag To convert (hide) into leather, as by treating with tannin. 2. To make brown by exposure to the sun. 3. Informal To thrash; beat. v.intr. To become brown or tawny We was taning leather all day. taning by Pocus November 25, 2013 0 0 Get merch Get the taning mug. Buy Now — $32.95 See more merch