a.[Z]

1. 瞬間的，即時的
   The reaction of the audience was instantaneous.

   觀眾即刻有了反應。

2. 猝然的，猝發的
   She accidentally swallowed the poison and death was instantaneous.

   她無意中吞下毒藥，猝然死去。

3. 【物】瞬時的，即時的

adj.

1. occurring or done instantly.
2. Physics  existing or measured at a particular instant.