as-yet-unknown adjective 1noun 1forms 1 adjective1 •Currently unknown.Now suppose that neutrons had some as-yet-unknown property that, if it could be observed, would enable us to predict their individual lifetimes. — 1990 noun1 •Something that is currently unknown.In their chapter Ellerton and Clements consider what is involved in the task of solving the equations that arise from acknowledging ignorance and using letters to stand in for as-yet-unknowns. — 2011 formsas-yet-unknowns
