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Can any body tell me software, to search a meaning for a word in a mobile (NOKIA)? 
A dictionary in a mobile.
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There are many dictionaries for mobile.Go to getjar.com and search for them.AFAIK,the dictionaries available are the oxford,webster,sun and advanced english dictionary.(all .jar)
If its a symbian, Oxford is the best, else try any .jar based ones, make sure its size is over 6 MB atleast, that much data should be there in order for it to be useful
which mobile you own ?