Meaning : Without delay or hesitation. With no time intervening.
Example :
He answered immediately.
Found an answer straightaway.
An official accused of dishonesty should be suspended forthwith.
Come here now!.
Synonyms : at once, directly, forthwith, instantly, like a shot, now, right away, straight off, straightaway
Meaning : Near or close by.
Example :
He passed immediately behind her.
Meaning : Bearing an immediate relation.
Example :
This immediately concerns your future.