In our modern world, the availability of computerized dictionaries is very attractive for people but we should not forget using traditional printed dictionaries which have the original values. Books will be always more valuable than information on the Internet as the process of searching information on the Internet is too simple so it does not give such kind of pleasure for people than if they would search information in books where they have to collect all pieces of information meticulously. In addition, those learners who are at an advanced level in language learning, should dare to use monolingual dictionaries which can have a developing impact on their skills and can give them self-confidence that they will be able not only to understand new words with equivalents on the source language but also phrases which are explained with definitions on the target language.