| ArtLex | | Dictionary of visual art defines more than 3,500 art-related terms. Also includes a comprehensive collection of artwork and famous quotes. |
| Biographical Dictionary | | Read about more than 28,000 notable men and women from history. Search by names, dates, professions, achievements, and more. |
| Dictionary.com | | Online English dictionary, thesaurus and reference guide. Includes word games, online translator, and word of the day feature. |
| DinoDictionary.com | | Features profiles of over 300 known dinosaurs along with pronunciations of their names. |
| Fact Monster | | An online dictionary with definitions of more than 125,000 words. |
| Giant Picture Dictionary | | Free online picture dictionary. Includes pictures representing both concrete and abstract concepts. |
| InfoVisual | | Thematic visual dictionary that focuses on learning through images. Concise definitions within the fields of vegetal biology, animal biology, human anatomy, and transportation. |
| Little Explorers | | Picture dictionary gives definitions, pictures, and Internet links for over 2,350 entries. Includes translations for English to and from Dutch, French, Spanish, and more. |
| OneLook Dictionary Search | | Type in a word and search many dictionaries at once. Also has a reverse dictionary and translations. |
| Pidic.com | | An online picture dictionary with thousands of images |
| PSEUDOdictionary | | Defines everyday words including slang, webspeak, and colloquialisms. |
| RhymeZone | | Online rhyming dictionary. Search for a word and get a list of potential words that rhyme in addition to a definition. |
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