мгновенно

1) General subject: as quick as lightning, in a crack, in a pig's whisper, in a trice, in a zip, instantaneously, instantly, quick as thought, have an immediate effect of v-ing (It had an immediate effect of making them more friendly. Это мгновенно настроило их на более дружеский лад.), in less than no time, in the flicker of a second, in a new york minute

2) American: stop-and-pop

3) Latin: instanter

4) Mathematics: immediately, in no time, momentarily

5) Jargon: INYM (In a New York minute), lemon

6) Information technology: in seconds

7) Business: on an instantaneous basis

8) Makarov: as quick as a flash, explosively, in a flash

9) Idiomatic expression: done in a zip