n.

1. 脊骨，脊柱 [C]
2. 主（山）脈，幹脈
3. 支柱；骨幹；基礎 [the S]
   Agriculture used to be the economic backbone of this country.

   農業曾是這個國家的經濟支柱。

4. 骨氣；堅毅，毅力 [U]
   Standing up to bullies takes plenty of backbone.

   勇敢地對付暴徒需有大無畏精神。

5. 【電腦】樞鏈路，供給中心（在網路環境扮演主要的通訊媒介，其功能在於將一些小型區域網路連結起來）

n.

1. the spine.
2. the chief support of a system or organization.
   ▸strength of character.
3. Computing  & Telecommunications  a high-speed, high-capacity digital connection which forms the axis of a local or wide area network.