- without delay or hesitation

- with no time intervening
"he answered immediately"
"found an answer straightaway"
"an official accused of dishonesty should be suspended forthwith"
"Come here now!"

1. Immediately; without delay; directly.

"Immediately there fell from his eyes as it had been scales; and he received sight forthwith." -- Acts ix. 18.

2. (Law) As soon as the thing required may be done by reasonable exertion confined to that object. Bouvier.