Entry 2 senses Webster, 1913 Bombshell /bäm'-shĕlˌ/ · Bomb·shell · IPA /ˈbɑmʃɛl/ 01 n. A bomb. See Bomb, n. 1. A bomb. See Bomb, n. See: Bomb 2. something or someone that stuns or amazes, especially suddenly and unexpectedly; as, the news of the president's affair was a political bombshell; a blonde bombshell.