Learn the meaning of conglomerate as a company or a rock, with examples from different contexts and sources. Find out how to say conglomerate in other languages with the translator tool. A conglomerate refers to a large corporation or company that owns and operates multiple diverse businesses across various industries. A conglomerate is a corporate group with subsidiaries in several different sectors, owned or controlled by a parent company. Learn how conglomerates diversify risk, optimize resources and cite Berkshire Hathaway as a successful example. A conglomerate is one very large corporation or company, composed of several combined companies, that is formed by either takeovers or mergers.