chairness UK /ˈt͡ʃɛənəs/US /ˈt͡ʃɛɹnəs/ noun1 •The essence of what it means to be a chair; the qualities that make a chair what it is.He extended his finger and outlined the shape of the chair. "It's about forms and negative space—she's taken the chairness away from the chair and left it purely object." — 2003