I have a question about the usage of "*pay*" and "*pay for*": 

> 
> 1. He ***paid*** the expense.
> 2. He ***paid for*** the expenses.
> 
> 
> 

Could both be the same? This [dictionary](http://www.learnersdictionary.com/definition/pay) seems to say "*pay*" and "*pay for*" are the same.