From the DAU Glossary at https://dap.dau.mil/glossary/pages/1577.aspx
Competition: An acquisition strategy whereby more than one contractor is sought to bid on a service or function; the winner is selected based on criteria established by the activity for which the work is to be performed. The law and DoD policy require maximum competition, to the extent possible, throughout the acquisition life cycle.
For further information on competition go to the AAP home page at https://dap.dau.mil/aap/pages/default.aspx and use the search function. You will find numerous questions and answers on the subject.