Definition of eardrum noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈɪədrʌm//
; NAmE NAmE//ˈɪrdrʌm//
Internal anatomy
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the piece of thin tightly stretched skin inside the ear which is moved by sound waves, making you able to hear a perforated eardrum His right eardrum burst. She thought the noise would burst her eardrums. See related entries: Internal anatomy
See the Oxford Advanced American Dictionary entry: eardrum