superfast

From super- +‎ fast.

• IPA^(key): /ˈsupɚˌfæst/

• Audio (US):

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superfast (not comparable)

1. Extremely fast.
   • 2005, Paul Carter, Don't Tell Mum I Work on the Rigs, Crows Nest: Allen and Unwin, page 23:

     The plane's large rear doors swallowed up my friend in superfast time, its departure sandblasting everyone in red prop wash as it vaporised down the main street and into the afternoon's dust-bowl sky.

superfast (not comparable)

1. At extremely high speed.

• superfats