From Longman Business Dictionary
consortiumcon·sor·ti·um /kənˈsɔːtiəm-ɔːr-/ noun (plural consortiums or consortia /-tiə/) [countableC]COMMERCE a combination of several companies, banks etc working together for a particular purpose, for example in order to buy something or build somethingSYN SYNDICATEthe consortium of 10 British and French construction firms who built the Channel tunnel