الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Semantic similarity is an important task that similanty degree between two words, sentences or documents in meaning .Measuring semantic Similarity is a long-standing problem in the Natural Language processing (NLP) field.Semantic similarity is applied for many areas in NLP , such as information retrival ,text classification, plagiarism detection , and others. Many semantic similarity researches have been developed for English texts ,but few developed for Arabic due to the ambiguity for Arabic in both sense and morphology Therefore , the first contribution in this thesis is developing a semantic similarity approach between Arabic sentences.