1. The fastest speed a vehicle (or organism) can travel at.
2. Used to express
good wishes, especially toward those undergoing travel; synonymous with "Godspeed".
3. (u) Used to describe the best possible outcome of a
situation; synonymous with "top
notch".
(u) Uncommonly used
1) "What'
s the top speed of a cheetah?" - "65 – 75 mph"
2) "I'm being deployed
soon." - "Top speed to you, mate"
3) "How'
s that report coming?" - "Working on it; top speed."