As new educators come along to update the definitions for dictionaries and encyclopedias, the truth sometimes becomes fractured along the way, just as a tale of gossip gains in mythical momentum the more it is told and tramples facts into obfuscation.
Most people hold faith in their dictionaries and encyclopedias.
They wouldn't dare distort these truths, knowing how much the public relies on dictionaries and encyclopedias for factual information. They would go to the proper source, if necessary, to get correct information. Well enough, These seem to be reasonable definitions. So, evidently writers of definitions can incorporate their own use of a word with impunity. These definitions all say much the same thing but in different words.