"Ghost words" are terms that appear in dictionaries or other reference materials but have no real meaning or usage in the language. They often arise from typographical errors, misinterpretations, or miscommunications during the editing process. These words can sometimes be mistakenly included in published works, leading to confusion among readers. An example of a ghost word is the term dord, which was mistakenly defined as a type of density in a dictionary due to a miscommunication between editors. Ghost words highlight the importance of careful editing and fact-checking in the creation of language resources.