childproof (ËtÊaÉªldpruËf) or child proof adj designed to eliminate or minimize hazards to children. childâ²proof` or childâ²-proof`, adj. 1. incapable of being opened, tampered with, or operated by a child. 2. made free of hazard for a child.
In biology, a kingdom is the top-level, or nearly the top-level, grouping of organisms in scientific classification. Originally, two kingdoms were distinguished, the Animalia (animals), which typically could move about, and the Plantae (plants), which typically could not.
Medical Definition of kingdom. 1  1: any of the three primary divisions into which natural objects are groupedâsee animal kingdom, mineral kingdom, plant kingdom. 2  2: a major category (as Protista) in biological taxonomy that ranks above the phylum and below the domain.