I have found the online version of The American Heritage® Dictionary. The definitions of every word are great, better than most of the dictionaries. But I would like to know whether the digital version contains everything in the print edition.

Sentence examples seem insufficient. for instance, "qualification", the first and second definitions are common, but it does not give ones, qualification. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
And Uncountable and Countable notes of every word are excluded.

Does the online version omits anything?