One that applies spots. One that looks for, locates, and reports something, as: A military or civil defense lookout. Informal A person hired to detect dishonest acts by employees, as in a bank. Sports One who identifies players on the field, as for a radio or television announcer. Sports One who is responsible for watching and guarding a performer during practice to prevent injury, as in gymnastics or weightlifting. One employed by a dry cleaner to remove spots.