Terminology is Strange to me

I know of handlers, event handlers, handler functions, event functions, and event handler functions - and a typical handler might have multiple event handler functions.
But calling something (a handler) which might contain many functions a "function" is quite confusing to me. I don't think I know of any similar system that uses naming that way.
It is even more confusing to me since there is a standard naming convention for such things - handler. And that handler contains functions, as opposed to being called a function. Reading the doc is confusing in places due to our ambiguous use of the word function.
(I'm in training - so I think about such things.)

Reporter: Tony Duarte
E-mail: tony.duarte@couchbase.com