Inprosal Share definition Flag an action or message (verbal or otherwise) to convey an interest in being proposed to, and that it would be okay or even preferred Mary's inprosal to John left him dumbstruck. Inprosal by VanillaThunder4492 December 29, 2011 0 0 Get merch Get the Inprosal mug. Buy Now — $32.95 See more merch