infant

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. A minor.

   “Thomas Humphrey Doleman died the 30th of August 1712, an infant, intestate and without issue; Lewis the next nephew died the 17th of April 1716, an infant about sixteen years old, having left his mother Mary Webb, ...”

3. (Commonwealth, Ireland, UK, countable)A student in an infant school or the first part of a primary school.
4. (obsolete)A noble or aristocratic youth.

   “Retourned home, the royall Infant fell / Into her former fitt [...].”

adj

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

   “Primary schooling in Ireland comprises two Infant years, which are equivalent to pre-school in other countries , and six grades or classes.”

   “Clearly, from the attention given to it, HMI believed that history should be part of the infant curriculum.”

2. (figuratively, not-comparable)small, being near its source.

   “Leaving Nantyglo, a small station at an altitude of 1,030 ft. with the platform on the eastern side, the train runs northwards over former G.W.R. metals, with the infant River Ebbw, a little more than a yard wide, on the west.”

verb

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

   “This worthy motto, "No bishop, no king," is […] infanted out of the same fears.”