1. A method for context-based disambiguation of abbreviations, comprising: determining a target abbreviation and one or more keywords appearing in context with the target abbreviation in a received passage, the target abbreviation representing a shortened form of one or more words; generating a contextual search query including the target abbreviation and said one or more keywords; searching a pseudo document index for one or more expansions of the target abbreviation by invoking the contextual search query, the pseudo document index containing index of one or more pseudo documents, associated one or more abbreviations, and associated context keywords; returning one or more target pseudo documents associated with the target abbreviation based on the searching of the pseudo document index; and providing one or more expansions associated with the target abbreviation based on the returned one or more target pseudo documents.