The youngest child in a family, or individual in a group.

(physics) The coefficient of elasticity of a solid; the rate of change of stress with strain.

(Southern US, Britain West Country, Northern England, informal) A young one: a youth, a child, a kid, young person.

(of a female animal) Pregnant.

Used other than figuratively or idiomatically: young lady. / A term of endearment or admonishment by adults for a young girl.

(idiomatic) young people; youth / (idiomatic) youthful, revitalising or youth-oriented ideas.

It's not very late (at night) and there's plenty of time.

An adventurous or high-spirited young man.

plural of young buck

To betray a constituent or charge out of self-serving interests or desperation.