The noun 女子 (nǚzǐ) means "woman" or "female." It is a formal term often used in news reports, official documents, and sports contexts such as 女子篮球 (women's basketball). It is more formal than 女人 and carries a neutral, respectful tone.
那位女子在比赛中打破了世界纪录。
nà wèi nǚzǐ zài bǐsài zhōng dǎpòle shìjiè jìlù.
That woman broke the world record in the competition.
警方正在寻找一名失踪的年轻女子。
jǐngfāng zhèngzài xúnzhǎo yī míng shīzōng de niánqīng nǚzǐ.
The police are searching for a missing young woman.
这位女子是今年最年轻的获奖者。
zhè wèi nǚzǐ shì jīnnián zuì niánqīng de huòjiǎngzhě.
This woman is the youngest winner this year.