After analyzing how people use of existing dictionary web sites, and based on data for quite literally billions of dictionary site visits, the people at RES realized that most dictionary sites were cluttered with things that most people don't use.They set about creating a dictionary web site with just what most people want: simple, clear, uncluttered, definitions, with just a few usage examples, synonyms and related terms, in type large enough to see.

How can you look up the spelling of a word when you don't already know the spelling? The what-is-the-definition-of.com site pays special attention to spelling correction. Years of dictionary web site logs were analyzed to extract millions of typographical and other errors that people have looked up. The result is that typos and inflected forms of words are are in the dictionary, showing the correction of the typo.

The lexicographers at RES, which runs a number of major reference web sites including dictionaries, analyzed how people use dictionary web sites and found two distinct groups, which they called "readers" and "writers".

Readers want to know what a specific word means. They want definitions in order of how likely is the sense, and only enough information to clarify the definition, like synonyms and usage examples. Writers, on the other hand, will look up several related words looking for the right one, and want to know more information about how it can be used, what it sounds like, and its relationship with other words. What-is-the-definition-of is a definitions site for readers.

What is the definition of love? This web site will tell you. What is the definition of insanity? What is the definition, what is the meaning of it all? It has hundreds of thousands of definitions, much more than Webster's dictionary. Whether to settle an argument or to understand a new term, what-is-the-definition-of is designed to be quick, simple, and clear.