at once; instantly.
“I called immediately for an ambulance”
synonyms: straightaway, at once, right away, instantly, now, directly, promptly, forthwith, this/that (very) minute, this/that instant, there and then, then and there, on the spot, here and now, without delay, without further ado, posthaste; More
without any intervening time or space.
“she was sitting immediately behind me”
in direct or very close relation.
“they would be the states most immediately affected by any such action”
synonyms: directly, right, exactly, precisely, squarely, just, dead; informalsmack dab
“I sat immediately behind him”
as soon as.
“let me know immediately she arrives”
without any intervening time or space
time or space