expatiate
     v : add details, as to an account or idea; clarify the meaning
         of and discourse in a learned way, usually in writing;
         "She elaborated on the main ideas in her dissertation"
         [syn: {elaborate}, {lucubrate}, {exposit}, {enlarge}, {flesh
         out}, {expand}, {expound}, {dilate}] [ant: {abridge}]
Source: WordNet® 2.0