Noah Webster
Infant
IN'FANT, noun [Latin infans; in and fans, speaking, fari, to speak.]
1. A child in the first period of life, beginning at his birth; a young babe. In common usage, a child ceases to be called an infant within the first or second year, but at no definite period. In some cases, authors indulge a greater latitude, and extend the term to include children of several years of age.
2. In law, a person under the age of twenty one years, who is incapable of making valid contracts.
IN'FANT, adjective Pertaining to infancy or the first period of life.
1. Young; tender; not mature; as infant strength.