[syn: instantaneously, outright, instantly, in a flash]
The Collaborative International Dictionary of English v.0.48:
Instantly \In"stant*ly\, adv.
1. Without the least delay or interval; at once; immediately.
--Macaulay.
[1913 Webster]
2. With urgency or importunity; earnestly; pressingly. "They
besought him instantly." --Luke vii. 4.
Syn: Directly; immediately; at once. See Directly.
[1913 Webster]
WordNet (r) 3.0 (2006):
instantly
adv 1: 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!" [syn:
immediately, instantly, straightaway, straight
off, directly, now, right away, at once,
forthwith, like a shot]
2: without any delay; "he was killed outright" [syn:
instantaneously, outright, instantly, in a flash]