Definitions for kickoff
Random House Webster's College Dictionary
Football. a place kick from the 40-yard line of the team kicking at the beginning of the first and third periods or after the team kicking has scored a touchdown or field goal.
Soccer. a kick that puts a stationary ball into play from the center line of the field at the start of a quarter or after a goal has been scored.
the initial stage of something; start; beginning.
Origin of kickoff:
(football) a kick from the center of the field to start a football game or to resume it after a score
beginning, commencement, first, outset, get-go, start, kickoff, starting time, showtime, offset(noun)
the time at which something is supposed to begin
"they got an early start"; "she knew from the get-go that he was the man for her"
kickoff, send-off, start-off(noun)
a start given to contestants
"I was there with my parents at the kickoff"