To add on and support this, I found this page: https://www.wordnik.com/words/master https://www.wordnik.com/words/master Not overly familiar with Wordnik, but

To add on and support this, I found this page: https://www.wordnik.com/words/master https://www.wordnik.com/words/master Not overly familiar with Wordnik, but a summary examination of this page shows a demonstrable variance in different senses and meanings drawn from different dictionaries. Check the etymology at the bottom; “Master” still retains this sense.