Definition of "infant" in English

noun

1. A very young human being, from birth to somewhere between six months and two years of age after birth, needing almost constant care and attention.

2. (law) A minor.

3. (countable, chiefly UK, Ireland, Commonwealth) A student in an infant school or the first part of a primary school.

4. (obsolete) A noble or aristocratic youth.

adjective

1. (not comparable, chiefly UK, Ireland, Commonwealth) Of or pertaining to the earlier half of primary school education.

2. (figurative, of a river) small, being near its source.

verb

1. (obsolete) To bear or bring forth (a child); to produce, in general.