/ˈseɪfti ||; ˈseftɪ/noun [U] the state of being safe; not being dangerous or in danger 安全:
In the interests of safety, smoking is forbidden. 禁止吸烟，以策安全。 road safety(= the prevention of road accidents) 道路安全New safety measures have been introduced on trains. 火车上已实行新的安全措施。