1 : an opening (in a wall or ship or armored vehicle) for firing through
2 : the left side of a ship or aircraft to someone who is aboard and facing the bow or nose
3 : (computer science) computer circuit consisting of the hardware and associated circuitry that links one device with another (especially a computer and a hard disk drive or other peripherals)
verbe
1 : carry or hold with both hands diagonally across the body, especially of weapons
