The electronic version of the Oxford Dictionary of English is handy for quickly looking up a word as you read a Web page or other document. To check a word, you only need to double-click it. You have to install iFinger before you can use the dictionary, which takes a while. The dictionary interface is compact. The search bar installs right into the title bar of just about any Windows application, even for programs such as Ad-aware.
For faster lookup, the most common meanings come up first, but you can expand the article to see more detailed information. The articles are hyperlinked. You can also expand the dictionary base by adding your own dictionaries, either word-by-word or by importing them from text files. This dictionary is helpful, even if you have the printed version.