hey sangeeta, there's so many related meaning of LSI. maybe it is large scale integration, latent semantic indexing, etc. i want you to be more elaborated. what do you exactly mean?. be direct in such questions for you to have a good explanation about. there is nothing wrong about this, i will wait.
Latent Semantic Indexing (LSI) is an indexing and retrieval method that uses a mathematical technique called Singular Value Decomposition (SVD) to identify patterns in the relationships between the terms and concepts contained in an unstructured collection of text. LSI is based on the principle that words that are used in the same contexts tend to have similar meanings
You can read here - http://www.webdesignindia.in/seo-optimization-india/lsi-search-engine-optimization-india.aspx and http://www.evancarmichael.com/Women...LSI-SEO-and-How-Do-I-Do-It-To-My-Website.html i hope you will be happy to get answer. Thanks Raj