a.

1. 看不見的；無形的
   Germs are invisible to the naked eye.

   細菌是肉眼所看不見的。

2. 微小得覺察不出的；不顯眼的[（+to）]
   The differences are almost invisible.

   這些差別簡直難以辨認。

3. 不露面的；暗藏的
4. 【經】非貿易的；無形的；暗的
   Insurance is one of Britain's most profitable invisible exports.

   保險業是英國獲益最大的無形出口之一。

n.

1. 看不見的物（或人）[C]
2. 【宗】靈界；上帝[the S]
3. 【經】無形輸入（或輸出）[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.