A rejected take-off (RTO) is the actions taken when it is decided to abandon the take-off and stop an aircraft during the take-off roll.
The Go/Stop Decision
In the event of an engine malfunction, the recognition of a significant abnormality, or an ATC instruction to stop the aircraft during the take off roll, transport aircraft in Performance Category ‘A’ should be able to safely reject the take off if the decision to do so is made at a speed not greater than the correctly calculated decision speed (V1).
A successful rejection should be achieved if the response is immediate and is completed in accordance with prescribed procedures (SOPs). After V1, a reject should only be considered if there is a strong reason to believe that the aircraft will not fly.