About Merriam-Webster Unabridged

  • America’s largest, most comprehensive dictionary has been reinvented for today’s librarian, teacher, and student.
  • With up-to-date information, definitions, usage notes, a modern layout, and other exciting features, Merriam-Webster Unabridged is the most authoritative source of information on the English language.

Let’s connect! Schedule a 1:1 conversation with a Britannica representative.

Features of Merriam-Webster Unabridged

  • Get category-specific.

    Dive into categories like Food & Beverage, Health & Medicine, Internet, Law, Music, and Science.

  • Go beyond the dictionary.

    Explore “Ask the Editor” videos, Top 10 Lists, Word of the Day, vocabulary quizzes, and Most Popular (the most frequently looked-up words on a daily and weekly basis).

  • Get weekly insights.

    Check out “A Thing About Words” - a weekly blog for insight and observations about language from Merriam-Webster’s editors.

  • Bonus:

    Tap advanced search tool for exclusive access to recently collected citations from the Merriam-Webster citation files.

Expedition: Learn! Scope & Sequence

Click to expand

View the available lessons for elementary and middle school science and social studies

Expedition: Learn! Languages

Spanish, Arabic, French, and 100+ more...

Spanish

Arabic

French

And 100+ more...

Translations available in 100+ languages for each lesson

Expedition: Learn! Reading Levels

Choose between 4 reading levels to meet the needs of every learner

Expedition: Learn! Spark Video

Each Expedition: Learn! Lesson begins with a video to spark students’ interest in the topic

COMING SOON!

Britannica Expedition: Learn!

Ignite the spark of curiosity and accelerate learning

You are reading a Middle School level article.

For Elementary or High School reading levels, please contact us.