Definition of toddler with references and citation.

A toddler is a young child typically between the ages of one and three years old who is just beginning to walk and explore the world around them. Toddlers are known for their curiosity, energy, and developing language skills.

According to the American Academy of Pediatrics, toddlers are in the stage of development known as early childhood, which is a critical time for learning and growth. Toddlers are starting to assert their independence and develop their own personalities, while also learning important skills such as walking, talking, and socializing with others.

Reference:
American Academy of Pediatrics. (n.d.). Toddler Development: 1 Year Old. HealthyChildren.org. https://www.healthychildren.org/English/ages-stages/toddler/Pages/Toddler-Development-1-Year-Old.aspx