Dictionary.com- https://www.dictionary.com/
Cambridge Dictionary- https://dictionary.cambridge.org/us/
Project Gutenberg Dictionary collection- https://www.gutenberg.org/ebooks/search/?query=dictionary&submit_search=Go%21
Collins Dictionary- https://www.collinsdictionary.com/us/
Merriam-Webster Dictionary- https://www.merriam-webster.com/
Merriam-Webster Visual Dictionary- http://www.visualdictionaryonline.com/
Samuel Johnson’s Dictionary of the English language: https://archive.org/details/dictionaryofengl01johnuoft/page/n6
Online dictionary for Library and Information Science- http://products.abc-clio.com/ODLIS/odlis_about
Green’s Dictionary of Slang- https://greensdictofslang.com/
ASL Dictionary- http://www.aslpro.cc/
Artlex Art Dictionary- https://www.artlex.com/
Glossary of Medieval Art and Architecture- https://sites.pitt.edu/~medart/menuglossary/INDEX.HTM
Rhyme Zone- https://www.rhymezone.com/
YourDictionary- https://www.yourdictionary.com/diction4.html