14. A computer-readable storage medium storing instructions that, when executed by a processor, perform operation comprising: receiving a first request for information corresponding to a word appearing in electronic content being rendered to a party submitting the first request when the first request is submitted, deriving context information for the word based on the electronic content being rendered to the party when the first request is submitted; storing the context information in association with the word; receiving a second request, at a time subsequent to the first request, for information corresponding to the word; in response to receiving the second request, accessing, from electronic storage, the context information stored in association with the word and derived based on the electronic content rendered during the first request; and enabling presentation, to a party submitting the second request, of the accessed context information derived based on the electronic content rendered during the first request along with information corresponding to the word.
19. The computer-readable storage medium of claim 14 wherein: receiving the first request and receiving the second request includes receiving a first request for a definition of a word and receiving a second request for the definition of the word; and enabling presentation, to the party submitting the second request, of the accessed context information derived based on the electronic content rendered during the first request along with information corresponding to the word includes enabling presentation, to the party submitting the second request, of the accessed context information derived based on the electronic content rendered during the first request along with the definition of the word.