This document provides a list and brief descriptions of several useful online dictionaries. It discusses Merriam-Webster, Cambridge Dictionary, Urban Dictionary, MacMillan Dictionary, Collins Dictionary, and Oxford dictionaries. For each, it gives the website URL and notes their strengths, such as being respected print dictionaries, having translation features, or catering to different types of language learners.

1. BEST ON-LINE DICTIONARIES
Here is a list of some useful and interesting on-line dictionaries in no particular order.
Merriam-Webster: One of the most respected print
dictionaries also has a website for your convenience. It’s made up
of a typical dictionary, a thesaurus, a Spanish to English translation,
etc. (https://www.merriam-webster.com)
Cambridge Dictionary: The Cambridge Dictionary is
another well-respected print dictionary with a lot of history
behind it that has a web counterpart. The online version is made
up of four dictionaries: the Cambridge Dictionary of American
English, the Cambridge Learner’s Dictionary, the Cambridge
International Dictionary of Phrasal Verbs and the Cambridge
International Dictionary of Idioms. It’s a big website that you
might want to explore if you’re looking for one of the more serious online
dictionaries. (https://dictionary.cambridge.org/us/)
Urban Dictionary: Laugh if you want, but this is
a valuable tool if you come across some slang you’re
not familiar with. If that’s what you need to learn, this is
one of the online dictionaries you’ll benefit most from.
Just be wary about going on too many random
searches… (https://www.urbandictionary.com)
MacMillan Dictionary: It is ideal for different
English language learners with games , resources, etc.
(https://www.macmillandictionary.com)
Collins Dictionary: Collins publishes monolingual English
and bilingual English-Spanish dictionaries, thesaurus, synonym
dictionaries, etc. (https://www.collinsdictionary.com/es/)
Oxford: This is an institution in the universe of dictionaries. The
digital version for English language learners is ideal for students. It
includes links to advanced learners, American version, Practical
English Usage, Academic English, Collocation Dictionary, etc.
(https://www.oxfordlearnersdictionaries.com)