形容词

1. (婴儿或动物)新生的，初生的
A newborn baby or animal is one that has just been born.

2. 新生儿;婴儿
A newborn is a baby that has just been born.

3. 新生的，新出现的(文学用语)
Writers sometimes use newborn to describe things that have just come into existence.

1. a baby from birth to four weeks

Synonym: neonatenewborn infantnewborn baby