1604, in the meaning defined at sense 1
A Who’s Who Regarding ‘Who’s’...
Whose line is it? Well, who's asking?
“Who'd.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/who%27d. Accessed 28 Nov. 2023.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
See Definitions and Examples »
Get Word of the Day daily email!