оружие(any instrument or means which is used for one's own defence or for attacking others • Rifles, arrows, atom bombs and tanks are all weapons; The police are looking for the murder weapon; Surprise is our best weapon); боевое средство; средство; средства самозащиты(у животных и насекомых); боезаряд
орудие("Three people were killed... by a single weapon, all personal effects removed in the middle of the city's most crowded park" (M. C. Smith, Gorky Park). — "В центре самого людного парка города нз одного оружия было убито трн человека и изъяты все личные вещи" (М. К. Смит "Парк Горького").)
оружие(An instrument of attack or defense in combat, as a gun, missile, or sword; Средство защиты или нападения во время боя, напр., автомат, ракета или холодное оружие)