Pooch/puːtʃ/ Definition 1 of 2Pro Tip 1/3Informal Term Used in casual conversation rather than formal or written English. I might adopt a pooch from the shelter soon. Pro Tip 2/3Affectionate Tone Conveys a sense of warmth or love when talking about dogs. My pooch loves to snuggle on the couch. Pro Tip 3/3Commonly Descriptive Often used with adjectives that highlight the dog's appearance or personality. Everyone adores the neighbor's friendly pooch.