redshirt

Etymology
From, originally after. In later senses with reference to the uniforms or outfits worn by such people.

Noun

 * 1)  A supporter of the Italian nationalist leader, especially a member of his thousand-man army which conquered Sicily.
 * 2) *2011,, The Pursuit of Italy, Penguin 2012, p. 196:
 * Loyal regiments from Naples and other provinces of the mainland fought valiantly and were victorious un several skirmishes against the redshirts near Capua.
 * 1)  A revolutionary or anarchist.
 * 2)  A college athlete who spends a year not participating in official athletic activities, but does not lose his or her eligibility to participate in following years.
 * 3)   An unimportant character introduced only to be killed in order to underscore the peril to the important characters; an expendable character.
 * 4)   A person responsible for loading and unloading weapons, artillery, and equipment from aircraft.
 * 1)   A person responsible for loading and unloading weapons, artillery, and equipment from aircraft.
 * 1)   A person responsible for loading and unloading weapons, artillery, and equipment from aircraft.

Verb

 * 1)  To place an athlete in a status wherein the athlete will spend a year not participating in official athletic activities, but will not lose his or her eligibility to participate in following years.
 * The university decided to redshirt the freshman linebacker to give him an extra year to build up his bulk.
 * 1)  To take on a status wherein one will spend a year not participating in official athletic activities.
 * 2)  To hold a child out of kindergarten for one year in the hope that the child will do better academically and socially.
 * 3) * 1985, March 1, "Some Educators Oppose Redshirting 5-Year-Olds," The Omaha World-Herald
 * Parents who redshirt their 5-year-olds instead of enrolling them in kindergarten are a concern to some Nebraska educators who are trying to reverse the trend of holding children back until age 6 to start school.
 * 1) * 1985, March 1, "Some Educators Oppose Redshirting 5-Year-Olds," The Omaha World-Herald
 * Parents who redshirt their 5-year-olds instead of enrolling them in kindergarten are a concern to some Nebraska educators who are trying to reverse the trend of holding children back until age 6 to start school.