Best Glossary Apps

169+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated June 2026

The best glossary apps on iPhone average 4.6★ across 169+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.

Top Picks for Glossary

Merriam-Webster Dictionary#2

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Strong Contender
🔍 Reference
4.8😊(320K ratings)
FreeAdsIn-App Purchases
#41in Reference
Merriam-Webster Dictionary screenshot 1
Merriam-Webster Dictionary screenshot 2
Merriam-Webster Dictionary screenshot 3
Merriam-Webster Dictionary screenshot 4

Access a premier iOS app for English language reference, education, and vocabulary building, with new word games and quizzes for learning. Features universal access, offline capabilities, voice search, daily word learning, thesaurus, example sentences, and pronunciations by real speakers. Enjoy features like favorite word syncing and Apple Watch integration. Subscribe to remove ads and access extra resources. Manage your subscription easily. Terms of Use: [Link to Terms of Use].

What We Love

  • 🚀 Easy to use
  • 👍 Comprehensive definitions
  • 👍 Helpful thesaurus
  • 🚀 Offline access

Room to Improve

  • 🐛 Ads can be intrusive
  • 🐛 Difficulty closing ads
  • 🐛 Repetitive game questions
Dictionary.com: English Words#3

Dictionary.com: English Words by Curiosity Media, Inc.

Dictionary, Thesaurus, Vocab
Worth Considering
🔍 Reference
4.7😐(19K ratings)
FreeAdsIn-App Purchases
Dictionary.com: English Words screenshot 1
Dictionary.com: English Words screenshot 2
Dictionary.com: English Words screenshot 3
Dictionary.com: English Words screenshot 4
Dictionary.com: English Words screenshot 5
Dictionary.com: English Words screenshot 6

Access the ultimate English language learning app packed with quizzes, games, and over 2 million definitions and synonyms. Enhance your vocabulary with word puzzles and daily challenges, enjoy dark mode, offline access, voice search, and more. Improve your English skills effortlessly!

What We Love

  • 🚀 Robust dictionary and thesaurus
  • 🤓 Helpful resources like blogs and articles
  • 💡 Useful word games and puzzles
  • 👍 Easy to use and navigate

Room to Improve

  • 🐛 Inconsistent search results and missing definitions
  • 💸 Aggressive ads even after paid upgrades
  • 🤯 Frequent crashes and performance issues

More Glossary apps to explore

4
Oxford Dictionary & Thesaurus
Oxford Dictionary & Thesaurus
Oxford Dictionary & Thesaurus
Thesaurus & Offline Vocabulary
Free

Access one of the highest authorities in language reference with the power of 15 major Oxford dictionaries at your fingertips. Explore advanced search and learning tools for a comprehensive linguistic experience.

🔍 Reference
(28K)
5
Bible Dictionary and Glossary
Bible Dictionary and Glossary
Bible Dictionary and Glossary
Webster Easton Smith Vine Nave
Free

Explore a comprehensive Bible Dictionary and Glossary offering insights from Webster, Easton, Smith, Vine, and more to enhance your understanding of biblical texts with in-depth definitions, cross-references, and concordance features. Unlock the richness of biblical knowledge with this valuable resource.

🔍 Reference
(4.9K)
6
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
English dictionary with Audio
Free

An innovative language tool designed to enhance vocabulary skills through interactive word meanings, synonyms, antonyms, and example sentences. Expand your linguistic knowledge effortlessly!

🔍 Reference
(4.3K)
7
English Dictionary *
English Dictionary *
English Dictionary *
Thesaurus and Vocabulary words
Free

Access a comprehensive offline English dictionary with over 4000 essential words at your fingertips. Enhance your vocabulary, improve language skills, and understand definitions without needing an internet connection.

🔍 Reference
(1.1K)
8
Dictionary.
Dictionary.
Dictionary.
by TheFreeDictionary.com
Free

Discover a comprehensive Dictionary and Thesaurus app with a Word of the Day feature, offline access, and resources from top sources. Access millions of definitions, synonyms, translations, and more for a versatile language tool.

🔍 Reference
(14K)
9
NIH: Diabetes Glossary
NIH: Diabetes Glossary
NIH: Diabetes Glossary
by Incelligence, Inc.
Free
💪 Health & Fitness
(0)
10
Khmer Buddhism Glossary
Khmer Buddhism Glossary
Khmer Buddhism Glossary
by Liratanak ANN
Free
📚 Books
(4)
11
Eng-Mm Dictionary
Eng-Mm Dictionary
Eng-Mm Dictionary
English to Myanmar Dictionary
Free

This application is an offline English to Myanmar and Myanmar to English dictionary with features like auto-suggest search, voice settings, word quiz, and learning modules. It offers example sentences, phonetic translations, synonyms, and antonyms, and can convert fonts between Myanmar Unicode and Zawgyi.

🔍 Reference
(958)
12
A Shakespeare Glossary
A Shakespeare Glossary
A Shakespeare Glossary
Learn Shakespeare's words
$0.99

This application is a comprehensive lexicon of terms used in Shakespeare's plays and poems, providing brief definitions, examples of usage, and features to search, bookmark, and share words. It helps readers and scholars understand unfamiliar words and phrases, with tools to learn new words daily and explore random entries.

🔍 Reference
(0)
13
ESA Glossary
ESA Glossary
ESA Glossary
by ESA - European Space Agency
Free
💼 Business
(0)
14
Fastdic - Fast Dictionary
Fastdic - Fast Dictionary
Fastdic - Fast Dictionary
English/Persian Translator
Free

Fastdic is a high-speed English/Persian translator app serving over 2 million active users monthly. Translate seamlessly between English and Persian/Farsi with its efficient dictionary function.

🔍 Reference
(6)
15
EMN Glossary
EMN Glossary
EMN Glossary
by European Union - Publications Office
Free
📊 Productivity
(0)
16
Web3Terms
Web3Terms
Web3Terms
Top 100 Web 3 Terms
Free

Learn blockchain and web3 with a comprehensive glossary of 100 essential terms, and enhance your knowledge by searching and browsing through the available resources. Start your learning journey today and master the fundamentals of web3!

📚 Education
(4)
17
LSHK Bilingual Glossary
LSHK Bilingual Glossary
LSHK Bilingual Glossary
by Apps Resource Centre, Hong Kong Baptist University
Free
📚 Education
(0)
18
MusicGlossary
MusicGlossary
MusicGlossary
by Hon Fai Yiu
Free

This music dictionary app provides access to over a thousand musical terms in German, French, Italian, and English, complete with audio pronunciations, a search function, and a favorites page to aid in studying. For those looking to further test their knowledge, a paid version is available that includes quiz games and additional features.

🎵 Music
(7)
19
CCPS Glossary
CCPS Glossary
CCPS Glossary
by AIChE
Free
📚 Education
(2)
20
Stock Compensation Glossary
Stock Compensation Glossary
Stock Compensation Glossary
by myStockOptions.com
Free
💼 Business
(1)

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