I am unable get a clear idea about the difference between a conference and a symposium. The folllowing are the meanings of symposium and conference from www.dictionary.com. As we can see below there is no significant difference between these two. I am not getting clarity in the difference from either the below definitions or Google search. I have attended both conferences and symposiums in my field, but unable to find any difference. Could someone provide me a clear-cut difference between these two (atleast theoretically)?
Symposium: a meeting or conference for the discussion of some subject, especially a meeting at which several speakers talk on or discuss a topic before an audience.
Conference: a meeting for consultation or discussion: a conference between a student and his adviser