n.

1. 安全，平安[U]
   The children were led to a place of safety.

   孩子们被带到一个安全的地方。

   Measures must be taken to insure traffic safety.

   必须采取措施保证交通安全。

2. 安全设施[C]
3. 【棒】安打[C]

n.

1. the condition of being safe.
   ▸ [as modifier] denoting something designed to prevent injury or damage:

   a safety barrier.
2. US informal a condom.
3. American Football  a defensive back who plays in a deep position.
4. American Football  a play in which the ball is downed by the offence in their own end zone, scoring two points to the defence.