The age of majority is eighteen.

（法律）未到法定年龄的。

youdao

The age of majority in each state and territory of Australia is eighteen years.

澳大利亚各个州和地区成年的法定年龄都是十八岁。

youdao

If a minor ratifies a contract upon reaching the age of majority, he or she is then bound to it.

如果未成年人在达到法定年龄时追认合同，他/便受合同之约束。

youdao

So,these are premature deaths. The majority of deaths is below the age of sixty,actually."

VOA: special.2011.02.16

The majority of people with melanoma are white men over the age of fifty.

VOA: special.2010.07.06

Thompson says the majority of his young boxers read below age level, and often go hungry.

VOA: standard.2010.04.29

However, the use of these funds is entirely up to the child when he or she reaches the state-specified age of majority.

WSJ: Mixing It Up: Advice for Grandparents

The Senate vote on the Comprehensive Test Ban Treaty (CTBT) was more than just the defeat of a flawed agreement, it signaled the coming of age of a majority of Americans on the futility of trying to defend the country through arms control.

CENTERFORSECURITYPOLICY: Center for Security Policy | A New Skepticism on Arms Control, By James T. HackettThe Washington Times, 18 October 1999

They found that popular snacks with peanuts were given to Israeli babies often before they were 6 months of age, whereas the majority of babies in the United Kingdom didn't taste peanut products until after the age of 1.

WSJ: Food Allergy Advice for Parents: Start Peanuts, Eggs and More Sooner