a person, animal, or organization that takes part in an activity, especially a race, when it begins
They all wait for the crack of the starter's pistol.
The starter waved the green flag and 43 cars raced past the grandstand.
The sprinters waited at the starting line, ready to be the first starters in the race.
Each team nominated a starter to represent them in the opening ceremony.
The new employee was assigned as the starter for the upcoming project.
