Video shows what companion means. A friend, acquaintance, or partner; someone with whom one spends time or keeps company. A person employed to accompany or travel with another.. The framework on the quarterdeck of a sailing ship through which daylight entered the cabins below.. companion synonyms: Wikisaurus:friend. Companion Meaning. How to pronounce, definition audio dictionary. How to say companion. Powered by MaryTTS, Wiktionary