beside – (adv. ) next to He is sitting beside me.
besides (sentence connector) – in additon, moreover, as well Besides being smart, he is funny and outgoing.
besides (prep.) except, otherwise, else We heard no other sound besides the breaking surf. Dictionary.com – #7 Usage notes
besides the point –
apart from, away from the central idea; Whether he gets a laugh or not is besides the point. (off topic)