Merriam-Webster

Merriam-Webster's Collegiate Dictionary, Eleventh Edition, is a newly revised and updated reference book that defines the current, active vocabulary of American English. With over 225,000 definitions.

Features more than 245,000 synonyms. Provides brief definitions for each word.

Designed for students grades 9-11, ages 14 and up, this newly update thesaurus offers more than 154,000 word choices.

A bilingual, bidirectional guide to North American English. More than 80,000 entries and 100,000 translations.