Emily Dickinson Lexicon

AUD'I-BLE, a. [L. audibilis, from audio, to hear. This word is evidently connected with the name of the ear; Gr. ουας, ουατος; Vulg. Gr. αυδια. The verb is contracted into Sp. oir; Port. ouvir; Fr. ouïr, to hear. Hence in law oyer, and from the French oyez, hear ye, the barbarous O yes, of our courts.]

That may be heard; perceivable by the ear; loud enough to be heard; as, an audible voice or whisper.