A delegate is similar to a function pointer in C/C++. It holds a reference to a method and to an object instance (if the method is non-static). Delegates are usually multicast, i.e. they hold references to several object/method pairs.
An event is a notification mechanism, based on delegates. The only thing it exposes publicly is a pair of methods (add/remove) to subscribe to or unsubscribe from the notification. A delegate type is used to define the signature of the handler methods, and the list of subscribers are (usually) stored internally as a delegate.
