Nama Peneliti/Mahasiswa: RIYAN ADI LESMANA (G64086037I) Judul: Pengembangan Word Net Bahasa Indonesia Berbasis Web Judul (English): Building Web Based Indonesian WordNet Pembimbing/Supervisor: Yani Nurhadriyani Abstrak/Abstract: RIYAN ADI LESMANA. Building Web Based Indonesian WordNet. Under supervision of AHMAD RIDHA and SRI NURDIATI. WordNet is an electronic lexical database that classifies categories of words such as nouns, adjectives, verbs, adverbs, and others in a set called synonim set (synset). WordNet for English has been developed by Princeton University. The purpose of this study is to build an web-based WordNet for Bahasa Indonesia. We used evolutionary method that started by building the parts that were well-understood as the first implementation and continuously developed based on comments from users until an adequate application had been developed. The data sources of the application are Kamus Besar Bahasa Indonesia (KBBI) and Indonesian thesaurus. Our application can display the meaning/definition of a word and display a word’s relations with other words. This application can also be used to add new words, definitions, examples, and word relationships; this function can only be done by users who have registered and been approved for registration by administrator. In this study we also developed an XML document format and XML Schema Definition to assist others in obtaining data from the system. Keywords: Indonesian Bahasa, Lexical Database, Wordnet.