kick·off or kick-off 
(kĭkôf′, -ŏf′)
(kĭkôf′, -ŏf′)n.
1. Football A place kick in football that starts play at the beginning of a half or after a team has scored.
2. Sports
a. A kick of a stationary ball from the middle of the field in soccer that starts play at the beginning of a half or after a goal has been scored.
b. A similar kick in Rugby.
3. Informal A beginning: the kickoff of a charity campaign.