Online dictionary and reference website.

Online dictionary with over 100,000 entries, definitions, and pronunciations.

Thematic visual dictionary that focuses on learning through images. Concise definitions within the fields of vegetal biology, animal biology, human anatomy, and transportation.

Read about more than 28,000 notable men and women from history. Search by names, dates, professions, achievements, and more.

A searchable dictionary of computer terms with definitions explained in simple language.

An online picture dictionary with thousands of images

Site listing several types of dictionaries related to the sciences.

Lookup a definition in the search bar or by first letter. Includes a "word of the day".