1. One or more computer-readable media maintaining instructions executable by one or more processors to perform operations comprising: presenting a portion of text of a digital work on a display of an electronic device; receiving a selection of a term of one or more words from the text of the digital work; accessing, based at least in part on the metadata associated with the digital work, at least one dictionary of a plurality of dictionaries to obtain at least one definition corresponding to the term; identifying at least two other occurrences of the term in another digital work maintained on the electronic device; determining, based in part on the two other occurrences, two or more groups of similar occurrences of the term; and displaying on the display: the at least one definition for the term obtained from the at least one dictionary; and two or more excerpts of text, each excerpt of text of the two or more excerpts of text including an occurrence of the term from a different group of the two or more groups.
1. One or more computer-readable media maintaining instructions executable by one or more processors to perform operations comprising: presenting a portion of text of a digital work on a display of an electronic device; receiving a selection of a term of one or more words from the text of the digital work; accessing, based at least in part on the metadata associated with the digital work, at least one dictionary of a plurality of dictionaries to obtain at least one definition corresponding to the term; identifying at least two other occurrences of the term in another digital work maintained on the electronic device; determining, based in part on the two other occurrences, two or more groups of similar occurrences of the term; and displaying on the display: the at least one definition for the term obtained from the at least one dictionary; and two or more excerpts of text, each excerpt of text of the two or more excerpts of text including an occurrence of the term from a different group of the two or more groups. 27. The one or more computer-readable media as recited in claim 1 , wherein the identifying comprises; accessing a first index contained in the metadata associated with the digital work, and accessing a second index contained in the metadata associated with the another digital work.