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Head-to-head · Online Dictionaries

Merriam-Webster Dictionary vs American Heritage Dictionary

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Merriam-Webster Dictionary #5 in Online Dictionaries 9.0/10 Free plan Free plan✓ 4 of 4 features Visit Dictionary
American Heritage Dictionary #14 in Online Dictionaries 8.1/10 Free plan Free plan✓ 4 of 4 features Visit the dictionary

Merriam-Webster Dictionary leads on 0 checks, American Heritage Dictionary on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMerriam-Webster Dictionary · 9.0/10
  • Free planboth

Merriam-Webster Dictionary scores higher on our rubric for online dictionaries: 9.0 against 8.1 out of 10; our editors rank them #5 and #14.

Merriam-Webster Dictionary is the better fit for english definition and thesaurus users. American Heritage Dictionary is the better fit for detailed English usage and etymology.

  • Merriam-Webster Dictionary fits best

    English definition and thesaurus users

  • American Heritage Dictionary fits best

    Detailed English usage and etymology

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Side by side

Feature Merriam-Webster Dictionary 9.0/10 Visit ↗ American Heritage Dictionary 8.1/10 Visit ↗
At a glance
Editor score 9.0 8.1
Ranking #5 in Online Dictionaries #14 in Online Dictionaries
Best for English definition and thesaurus users Detailed English usage and etymology
Pricing model Free plan + paid Free plan + paid
Starting price — Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Mobile Cloud, Mobile
Platforms Web, iOS, Android Web, iOS, Android
Features Merriam-Webster Dictionary 4/4 · American Heritage Dictionary 4/4
Audio pronunciation ✓ ✓
Usage examples ✓ ✓
Translation lookup ✓ ✓
Offline access ✓ ✓
Specs
Mobile apps Ios_android Ios_android
Languages covered 1 Not checked yet
Our review
Pros
  • Free definitions, audio pronunciations, examples, and thesaurus content
  • Offline definitions and synonyms are available in the mobile apps
  • Voice search, quizzes, games, favorites, and search history support learning
  • Usage Panel guidance supports grammar and usage decisions.
  • Etymologies include Indo-European and Semitic root appendices.
  • Mobile apps offer voice, camera, audio, and offline lookup.
Cons
  • The primary dictionary experience is focused on English
  • Premium access is required for an ad-free experience
  • Medical, legal, and kids dictionaries require additional purchases
  • Its reference focus is English rather than broad multilingual coverage.
  • Audio and offline lookup require the full mobile version.
  • Mobile pricing and feature availability differ by store and app version.
Our verdict

Merriam-Webster Dictionary is an online English-language reference service for definitions, pronunciations, synonyms, usage examples, word histories, and related language information. It suits students, writers, learners, and anyone who…

Read the review →

American Heritage Dictionary is an English reference dictionary for students, professionals, academics, and general readers. It provides searchable dictionary entries on the web and through iOS and Android apps, with definitions,…

Read the review →
  1. Merriam-Webster DictionaryOnline Dictionaries 9.0Free plan
  2. American Heritage DictionaryOnline Dictionaries 8.1Free plan

Strengths and trade-offs

  • Merriam-Webster Dictionary — where it wins

    • Free definitions, audio pronunciations, examples, and thesaurus content
    • Offline definitions and synonyms are available in the mobile apps
    • Voice search, quizzes, games, favorites, and search history support learning

    Where it doesn't

    • The primary dictionary experience is focused on English
    • Premium access is required for an ad-free experience
    • Medical, legal, and kids dictionaries require additional purchases
  • American Heritage Dictionary — where it wins

    • Usage Panel guidance supports grammar and usage decisions.
    • Etymologies include Indo-European and Semitic root appendices.
    • Mobile apps offer voice, camera, audio, and offline lookup.

    Where it doesn't

    • Its reference focus is English rather than broad multilingual coverage.
    • Audio and offline lookup require the full mobile version.
    • Mobile pricing and feature availability differ by store and app version.

More comparisons

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update