a.

1. 会意的，心照不宣的
   He gave me a knowing look.

   他会意地看了我一眼。

2. 通晓的；有知识的；消息灵通的
   a knowing person

   知识渊博的人

3. 精明的，聪明的
4. 故意的，蓄意的

n.

1. 知晓；认知[U]
   There's no knowing what they will do.

   没法知道他们会做些什么。

adj.

1. suggesting that one has secret knowledge:
   a knowing smile.
   ▸chiefly derogatory experienced or shrewd, especially excessively or prematurely so.
2. done in full awareness or consciousness.

n.