rook·ie ( P ) Pronunciation Key (rk) n. Slang. 1.An untrained or inexperienced recruit, as in the army or police. 2.An inexperienced person; a novice. Sports. A first-year player, especially in a professional sport. clone ( P ) Pronunciation Key (kln) n. 1.A cell, group of cells, or organism that are descended from and genetically identical to a single common ancestor, such as a bacterial colony whose members arose from a single original cell. 2.An organism descended asexually from a single ancestor, such as a plant produced by layering or a polyp produced by budding. 3.A DNA sequence, such as a gene, that is transferred from one organism to another and replicated by genetic engineering techniques. 4.One that copies or closely resembles another, as in appearance or function: “filled with business-school clones in gray and blue suits†(Michael M. Thomas).