adj. 1.able to perceive sound hearing n. 1.(law) a proceeding (usually by a court) where evidence is taken for the purpose of determining an issue of fact and reaching a decision based on that evidence 2.an opportunity to state your case and be heard 3.the range within which a voice can be heard 4.the act of hearing attentively 5.a session (of a committee or grand jury) in which witnesses are called and testimony is taken 6.the ability to hear