14. The method according to claim 10 , wherein the acquiring step acquires the history information on the viewing of the word and the history information on the usage of the word, and if the history information on the viewing of the word does not meet a criterion that is related to the viewing of the word and predetermined as a criterion for presuming that the particular user knows the meaning of the word and if the history information on the usage of the word does not meet a criterion that is related to the usage of the word and predetermined as a criterion for presuming that the particular user knows the meaning of the word, the determining step determines that the meaning of the word needs to be presented to the particular user.
10. A method for helping in a reading of an electronic message exchanged between multiple users, the method comprising the steps of: a chat room or instant message utility sending an electronic message between users; extracting a word from the electronic message sent to a particular user; acquiring history information on the word being extracted, wherein the history information includes a viewing of the word by the particular user, a usage of the word by the particular user, and a consultation of an electronic dictionary for the meaning of the word by the particular user; determining, based on the acquired history information, whether a meaning of the extracted word needs to be presented to the particular user on a display, wherein the determining is based on a criteria related to a viewing of the word by the particular user, a criteria related to a usage of the word by the particular user, and a criteria related to a consultation of an electronic dictionary for the meaning of the word by the particular user; and displaying the meaning of the word in a case in which the determining results in a determination that the meaning of the word needs to be presented to the user.