There are several free online dictionaries available that provide definitions, pronunciations, and other linguistic information. Here are some popular ones:

  1. Merriam-Webster Online: Merriam-Webster offers a free online dictionary that includes definitions, pronunciations, etymology, and usage examples. It covers a wide range of words and phrases from English and other languages.
  2. Oxford English Dictionary (OED) Online: While the full version of the Oxford English Dictionary requires a subscription, the Oxford Dictionaries website offers a free version with definitions, pronunciations, and usage guidance for a wide range of words.
  3. Cambridge Dictionary Online: The Cambridge Dictionary provides free access to its online dictionary, which includes definitions, pronunciations, and examples of usage. It covers both British and American English, as well as translations into multiple languages.
  4. Dictionary.com: Dictionary.com offers a free online dictionary with definitions, pronunciations, synonyms, and translations. It also includes additional features such as word of the day, audio pronunciations, and grammar tips.
  5. Collins Dictionary Online: Collins Dictionary provides a free online dictionary with definitions, pronunciations, translations, and usage examples. It covers a wide range of words and phrases from English and other languages.
  6. Macmillan Dictionary Online: Macmillan Dictionary offers a free online dictionary with definitions, pronunciations, synonyms, and usage notes. It also includes features such as word of the day and trending words.
  7. Wiktionary: Wiktionary is a free multilingual dictionary that is collaboratively edited by volunteers. It provides definitions, pronunciations, translations, and etymologies for words in multiple languages.
  8. The Free Dictionary: The Free Dictionary offers a comprehensive online dictionary with definitions, pronunciations, synonyms, and translations. It also includes additional features such as medical, legal, and financial dictionaries, as well as encyclopedia articles.

These free online dictionaries are valuable resources for obtaining accurate and reliable information about words and their meanings. They are widely used by students, writers, professionals, and language enthusiasts alike.