1) Action after a yellow flag 2) And engine 3) Begin anew 4) Boot up again 5) Brazilian boy band 6) Commence once more 7) Computer command 8) Computer instruction 9) Computer-menu option 10) Fatal error follower, often 11) Go back to square one 12) lndy 500 occurrence 13) Lndy500 occurrence 14) Race do-over 1) Reboot 2) Recommence 3) Renew 4) Revitalize 
[training course] Restart was a programme in the United Kingdom for people who were long-term unemployed. The aim was to encourage them to find work. It was run by Jobcentres. ...
[v] - restart and engine, for example
In sim racing, when a majority of the racers choose to restart, usually after a bad accident which puts most of the cars out of the race.