Definition of "four-year-old" []

• Four years of age (adjective)

WordNet. Princeton University. 2010.

• "The dog is described as a four-year-old Shitzu-Maltese named Oban, and also goes by Obie."
• "The show has given Jess a best friend named Cece who's an ultraconfident model, who explains her friendship with Jess by referring to Jess' pure, immaculately good heart, like she's referring to a four-year-old or a puppy."
• "My four-year-old daughter was too young to sit still through two hours of legal arguments."