4. A method comprising: under control of one or more processors configured with executable instructions, receiving a selection of a term of one or more words in a first digital work; selecting a dictionary based at least in part on metadata providing information related to content of the digital work; identifying two or more occurrences of the term in a second digital work that is different from the first digital work; determining, based in part on the two other occurrences, two or more groups of occurrences of the term, a group of the two or more groups including one or more similar occurrences of the term; and presenting a definition for the term obtained from the 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.
13. The method as recited in claim 4 , further comprising: prior to presenting the definition for the term, determining a part of speech corresponding to the term; and presenting the definition for the term based, at least in part on determining that the definition is for a same part of speech.