The United Nations Convention on the Rights of the Child defines child as, "A human being below the age of 18 years unless under the law applicable to the child, majority is attained earlier." [11]

In contemporary English, kid is neither slang nor improper. It is, however, most definitely informal, so those writing professionally or in a formal register might prefer to use child.

CHILD definition: a person between birth and puberty or full growth. See examples of child used in a sentence.

CHILD definition: 1. a boy or girl from the time of birth until he or she is an adult, or a son or daughter of any…. Learn more.

1. a person between birth and full growth; a young boy or girl. 2. a son or daughter. 3. a baby or infant.

A child is a human being who is not yet an adult. When I was a child I lived in a country village. He's just a child. ...a child of six.

A person who has (or is considered to have) the character, manners, or attainments of a child, usually with negative connotations; an immature, irresponsible, or childish person.

Understanding your child’s growth and development stages and milestones is an important part of parenting. Use this guide from CHOC to follow along with your child's milestones.

5 days ago · child (plural children or (dialectal or archaic) childer) (broadly) A person who has not yet reached adulthood, whether natural (puberty), cultural (initiation), or legal (majority).

4 days ago · Developmental Milestone Videos In this video, parents of young children share their personal experiences of using CDC’s “Learn the Signs. Act Early.” tools and resources to learn about …