underage
US
UK underage, under-age adj: (person: legally too young) (指人)
SC 未达到法定年龄的，未成年的 wèi dá dào fǎ dìng nián líng de，wèi chéng nián de
It is against the law to buy alcohol for people who are underage.
underage, under-age adj: (act: involving a minor) (行为等)
SC 未成年人做的，不成熟的 wèi chéng nián rén zuò de，bù chéng shú de
Underage sex is illegal in many countries.
underage drinking, under-age n: (alcohol consumption by minors)
SC 未成年人饮酒
This leaflet on underage drinking contains advice for parents of teenage children.