From Longman Business Dictionaryfour Psfour Ps /ˌfɔː ˈpiːzˌfɔːr-/ nounMARKETING the four Ps used to talk about the activity of marketing a product or service in relation to: PRODUCT (what to sell), PRICE (the cost of providing a product or service), PLACE (where it is sold), and PROMOTION (special activities aimed at selling a product or service) → see also marketing mix under mix