Erin McKean, a lexicographer who is the founder of Wordnik.com and formerly the editor-in-chief of American Dictionaries for Oxford University Press, thinks every single word that's ever been used should be "lookupable."

She discusses why she's aiming to add one million words to her online dictionary and why it's necessary to have a place to look up words like "farecast" and "roomnesia."

favorite word sent to me last week: 'chong': the practice of taking random walks, or anything that gives the same pleasure as a random walk

— Erin McKean (@emckean) October 18, 2015

Multitsking - scolding/insulting more than one person or groups at a time. cc @BrianLehrer @wordnik

— Josh Weinberger (@kitson) October 26, 2015

@BrianLehrer mentioned my favorite word that's not in the dictionary in closing today: Crafternoon! All teen #librarians know that one!

— Jes S (@jeschnei) October 26, 2015