Definitionen
1.NounA person who follows instructions to the letter and avoids taking any risks.
2.NounA person who strives to live up to the expectations of others; a person who follows the rules and strives to achieve the conventional definition of success.
3.NounOne whose job consists primarily of administrative work indicating tasks that have been completed.
4.NounSomeone who is counted in an organization as representing a minority ethnic group but who is so assimilated into the dominant culture that their ethnic status becomes meaningless.
5.NounUsed other than figuratively or idiomatically: see box, checker. Someone or something that checks boxes.