1. 准确地：on the nail 立即 | on the nose 准确地 | on the q.t. 悄悄的;暗中(quiet)

2. 整点,整齐：on the level 说真话 | on the nose 整点,整齐 | on the rock 处境困难

3. 整点 完全：39 tourist junkets公款旅游 | On the nose整点 完全 | 41 you're the man !你真厉害!

4. 准确, 恰, 正好：On the nod 赊购 | On the nose 准确, 恰, 正好 | On the rebound (从地上, 墙上等) 弹回之际或之后

adj

1. being precise with regard to a prescribed or specified criterion

e.g. his guess was on the nose
the prediction for snow was right on the button

Synonym: on the button