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."