auditory canal au·di·to·rycanal uncommon noun 1. either of the passages in the outer ear from the auricle to the tympanic membrane Synonymsauditory meatusacoustic meatusear canalauditory canalexternal auditory canal Related words Broader terms meatus Parts external ear Part of auriculare WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.