Football . a place kick or a drop kick from the 40-yd. 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

the campaign kickoff.

verb

kick