Etymologies: The origin and historical development of words.
Pronunciation: How to pronounce words, often using phonetic symbols.
Parts of Speech: The grammatical function of a word (noun, verb, adjective, etc.).
Synonyms and Antonyms: Words with similar or opposite meanings.
Examples: Sentences demonstrating the use of the word in context.
Idioms and Phrases: Common expressions with meanings different from the literal meanings of the individual words.
Proper Nouns: Definitions of people, places, and things that have specific names.
Abbreviations and Acronyms: Definitions of shortened forms of words and phrases.
Foreign Language Equivalents: Translations of words into other languages.
Illustrations: Pictures and diagrams to help visualize concepts or objects.
Appendices: Additional information such as lists of prefixes, suffixes, irregular verbs, or common misspellings.
Biographies: Brief summaries of the lives of notable individuals.
Geographical Information: Definitions of places, countries, and geographical features.
Historical Information: Definitions of historical events, periods, and movements.
Scientific and Technical Terms: Definitions of words used in specific fields.
Cultural Information: Definitions of concepts, traditions, and practices from different cultures.
The specific information included in a dictionary will depend on its purpose and target audience. For example, a dictionary for children might include more illustrations and simpler definitions, while a specialized dictionary for a specific field might contain a more in-depth focus on technical terms.