adjective
/ˈjʌŋ/ younger /ˈjʌŋgɚ/; -gest /-gəst/
in an early stage of life, growth, or development :not yet old
recently formed, produced, started, etc.
not getting any younger
informal + humorous - used to say that someone is getting older and may not have much more time to do something
the younger
used in comparing the ages of two people who are members of the same family
used to refer to the younger of two people (such as a father and son) who have the same name
years young
informal - used to describe an older person's age in a way that is meant to suggest that the person still looks or feels young
you're only young once
used to say that people should enjoy themselves while they are young;
noun
the young :young people
[plural] :young animals, birds, etc.
young and old
young and old people
US