Dictionaries are collections of words listed alphabetically with explanations, definitions, pronunciations, etymologies or usage details. The same term may also refer to a collection of terms in a language with their equivalents in another one.
Virtual dictionaries are software applications that, once installed on the computer, allow users to easily search for definitions or synonyms within a user-friendly interface.
They are usually based on several online dictionaries and are meant to reduce the time spent on searching for trustworthy sources.