youngˈster noun

1. A young person, esp a young man, or (formerly) a lively young man
2. A child (informal)

youngth noun (Spenser)

Youth

youngthˈly adjective (Spenser)

Youthful

young adult offender noun (law)

A lawbreaker aged between 18 and 21

young blood noun

A fresh accession of strength, personnel, ideas, etc

Young England noun

During the Corn-Laws struggle (1842–45), a small band of young Tory politicians who hated Free Trade and Radicalism, and professed a sentimental attachment to earlier forms of social life in England

Young Britain, America, etc noun

The rising generation in Britain, America, etc

youngˈ-eyed adjective (Shakespeare)

With the bright eyes of youth

young fogy or young fogey noun

A young person with (esp vociferously proffered) conservative or reactionary opinions

young fōˈgyish or young fōˈgeyish adjective

young fustic see under fustic

young gun noun (informal)

An enthusiastic and dynamic young person

Young Ireland noun

A group of Irish nationalists who broke away from O’Connell about 1844, because of his strong objection to the use of physical force

Young Italy noun

An association of Italian republican agitators, active about 1834, under the lead of Mazzini

young lady or young man noun

A girlfriend or boyfriend, a sweetheart

young offender noun

A lawbreaker aged between 10 and 21 (young offender institution an establishment, replacing the borstal, for the detention of young offenders who are given custodial sentences)

young person noun

1. Someone aged fourteen and over, but under eighteen (law)
2. In Factory Acts, etc, a person who is under eighteen years of age but no longer a child

Young Turk noun

1. Any of a body of Turkish reformers who brought about the revolution of 1908
2. (also without caps) a progressive, rebellious, impetuous, etc member of an organization

with young

(of an animal) pregnant