Used as an exclamation to begin or urge action.
Definitions
A command or exhortation to start moving or to begin an activity immediately. "Ready, set, go!" shouted the starter.
Synonyms
Go ahead!
Off you go!
Get going!
Used predicatively or attributively to mean ‘ready’, ‘functioning’, or ‘approved’ (e.g., “All systems are go”).
Definitions
Ready for use or in operation; functioning or approved. The rocket is fueled and all systems are go.