1) a group of separate businesses or business people joining together and cooperating to complete a project, work together to perform a contract or conduct an on-going business. for example, six companies, including bechtel and kaiser, joined together in a consortium to build boulder (now hoover) dam, with each providing different expertise or components. 2) the marital relationship, particularly sexual intimacies, between husband and wife. consortium arises in a lawsuit as a claim of “loss of consortium.” often it means that due to one spouse’s injuries or emotional distress he/she cannot have sexual relations for a period of time or permanently, which is a loss to the mate for which he/she should be awarded damages. how loss of consortium is valued in money terms is a difficult question.