WordNet is a kind of online English language database. The words are grouped into synonyms and definitions are provided. One could say WordNet combines a dictionary and thesaurus.

Christiane Fellbaum has written:

'WordNet'

Someone who works to protect the environment from destruction or pollution. (WordNet)

"paradigm, epitome, image."

From Babylon, a computer program. More exactly, from WordNet 2.0.

"The new law might abridge our freedom of expression"
"The manuscript must be abridged"

- taken from Wordnet dictionary