ɪˈstæb.lɪʃ plʌndʒ the act of propelling with force begin with vigor He launched into a long diatribe She plunged into a dangerous adventure smoothen the surface of launch plaster propel with force launch the space shuttle Launch a ship get going; give impetus to launch a career Her actions set in motion a complicated judicial process launch for the first time; launch on a maiden voyage launch a ship set up or found She set up a literacy program a motorboat with an open deck or a half deck