Age

still in the earlier stages of life

He has a young brother who is learning to walk.

living in the later stages of life

She cherished the wisdom and experience that came with being old.

(of a person) approximately between 45 to 65 years old, typically indicating a stage of life between young adulthood and old age

The middle-aged man enjoyed his evening walks in the park.

a fully grown man or woman

Adults have the freedom to make their own decisions and choices.

a student who is in the year before the last year of college or high school

As juniors, they are preparing for standardized tests and college entrance exams.

the number of years something has existed or someone has been alive

Age is just a number; it doesn't define your capabilities.

having the age of thirteen to nineteen

She is enjoying her teenage years, filled with new experiences and friendships.

having the characteristics that are typical of young people

Despite her age, she had a youthful appearance, with smooth skin and a radiant smile.

fully-grown and physically developed

Despite her young age, she possessed a mature appearance, with features that belied her years.

advanced in age

The elderly couple enjoyed taking leisurely walks together in the park.

a student who has one more year to graduate from a university or high school

In college, seniors have the opportunity to complete a senior thesis.