a.

1. 看不见的；无形的
   Germs are invisible to the naked eye.

   细菌是肉眼所看不见的。

2. 微小得觉察不出的；不显眼的[（+to）]
   The differences are almost invisible.

   这些差别简直难以辨认。

3. 不露面的；暗藏的
4. 【经】非贸易的；无形的；暗的
   Insurance is one of Britain's most profitable invisible exports.

   保险业是英国获益最大的无形出口之一。

n.

1. 看不见的物（或人）[C]
2. 【宗】灵界；上帝[the S]
3. 【经】无形输入（或输出）[P]

adj.

1. unable to be seen, either by nature or because concealed.
   ▸treated as if unable to be seen; ignored.
2. Economics  relating to or denoting earnings which a country makes from the sale of services or other items not constituting tangible commodities.

n.