english dictionary - SERP Analysis

https://www.oed.com/

https://www.dictionary.com/

https://dictionary.cambridge.org/us/

https://play.google.com/store/apps/details%3Fid%3Dlivio.pack.lang.en_US%26hl%3Den_US

https://www.merriam-webster.com/

https://quod.lib.umich.edu/m/middle-english-dictionary/dictionary

https://www.wordreference.com/

https://www.oxfordlearnersdictionaries.com/us/

https://www.collinsdictionary.com/us/dictionary/english

https://www.dclibrary.org/research-and-learn/oxford-english-dictionary