A small Chinese tree (Prunus persica) widely cultivated throughout temperate regions, having pink flowers and edible fruit. The soft juicy fruit of this tree, having yellow flesh, downy, red-tinted yellow skin, and a deeply sculptured stone containing a single seed. A light moderate to strong yellowish pink to light orange. Informal A particularly admirable or pleasing person or thing. To inform on someone; turn informer: "Middle-level bureaucrats cravenly peach on their bosses [when] one of them does something the tiniest bit illegal\u201d ( National Observer). To inform against: "He has peached me and all the others, to save his life\u201d ( Daniel Defoe).