• The whole duration of a being, whether animal, vegetable, or other kind; lifetime. • That part of the duration of a being or a thing which is between its beginning and any given time; as, what is the present age of a man, or of the earth? • The latter part of life; an advanced period of life; seniority; state of being old. • One of the stages of life; as, the age of infancy, of youth, etc. • Mature age; especially, the time of life at which one attains full personal rights and capacities; as, to come of age; he (or she) is of age. • The time of life at which some particular power or capacity is understood to become vested; as, the age of consent; the age of discretion. • A particular period of time in history, as distinguished from others; as, the golden age, the age of Pericles. • A great period in the history of the Earth. • A century; the period of one hundred years. • The people who live at a particular period; hence, a generation. • A long time. • To grow aged; to become old; to show marks of age; as, he grew fat as he aged. • To cause to grow old; to impart the characteristics of age to; as, grief ages us.