The term "on an exclusive basis" refers to something that is done or experienced in a way that excludes all others. It means being the only one who has access, enjoys the privilege, or experiences something to the exclusion of everyone else. For example, if someone says they are working on a project "exclusively," it means they are focusing solely on that task and not doing anything else at the same time. Similarly, if an event is advertised as being open only to certain people, it means those individuals have access while others do not.