deafen /ˈdɛfən/ verb3 •To make deaf, either temporarily or permanently.The head injury deafened her for life. •(figurative, rare) To stun, as with noise.Racine left the ground […] deafened, dazzled and tired to death. — 1849 •To make soundproof. formsdeafened · deafening · deafeneth · deafens · deafenest