Affirmed. See O.I.C.L. v. Dep’t of Children & Families, 169 So.3d 1244, 1246 (Fla. 4th DCA 2015) (affirming the denial of a private petition for dependency based on the ground, among others, that the child who was being eared for by an uncle did not qualify as dependent); Dep’t of Children & Families v. Dixon, 938 So.2d 992 (Fla. 4th DCA 2006) (holding, based on a concession of error, that the “trial court was without jurisdiction to conduct an adjudicatory hearing because the children turned 18 before the date of the hearing”); In re M.C.S., 327 P.3d 360, 363 (Colo.App. 2014) (dismissing a petition for lack of subject matter jurisdiction on the ground that “a juvenile court has subject-matter jurisdiction only to adjudicate children younger than eighteen” and observing that the court is “not at liberty to expand either the definition of ‘child’ or the court’s jurisdictional, reach”).