Senses
军机/ 軍機 military aircraft
military airplane; warplane
军机/ 軍機 military plans
plans, strategies, or measures concerning military operations
军机/ 軍機 military secret
confidential military information; military secret
军机/ 軍機 Privy Council
(historical) the Grand Council or Privy Council during the Qing dynasty
军机/ 軍機 military affairs
important or significant military matters