Dic: come of age

• Recycling is an issue that has come of age in Britain in the last decade.
• The idea of equality in the workplace has come of age.
• After years of sophisticated mimicry, Japanese design has come of age.

PHRASE : V inflects | If something comes of age, it reaches an important stage of development and is accepted by a large number of people. | cf: something or someone that has come of age has reached full, successful, development.

• The company was to be held in trust for Eddie until he came of age.
• Of all the kids who come of age this year, how many will actually vote?

PHRASE : V inflects | When someone comes of age, they become legally an adult.

.... Cobuild, http://idioms.thefreedictionary.com/come+of+age