noun

• (Canada, US) A bomber crew member who sights and releases bombs.
  "The bombardier then checked the gyroscopic stabilization of the bombsight and clutched in the electrical motor."
• (Canada, British) A non-commissioned officer rank in artillery, equivalent to corporal. Abbreviated Bdr.
  "Wikipedia: Bombardier (Bdr) and Lance Bombardier (LBdr or L/Bdr) are British Army ranks used in the Royal Artillery and Royal Horse Artillery instead of (respectively) Corporal and Lance Corporal. In the Canadian Forces, the Artillery Branch uses the ranks of Master Bombardier and Bombardier instead of Master Corporal and Corporal."
• (entomology) A bombardier beetle.

noun

• (Canada) An enclosed passenger vehicle, propelled over snow and ice by caterpillar tracks and steered by skis, whose actual original product name was Auto-Neige™/Snowmobile™, made by Bombardier Ltée.