721 Share definition Flag Love you = seven (7) letters, two (2) words, one (1) meaning. Shorter version of 831 (8 letters, 3 words, 1 meaning.) Text message: "721" or "Miss u, baby. C u 2nite. 721" 721 by Ethan Locke July 10, 2010 0 0 Get merch Get the 721 mug. Buy Now — $32.95 See more merch