To perceive (sound) by the ear: Can you hear the signal? To learn by hearing; be told by others: I heard she got married. To listen to attentively: Hear what I have to tell you. To listen to in an official, professional, or formal capacity: heard the last witness in the afternoon. To listen to and consider favorably: Lord, hear my prayer! To attend or participate in: hear Mass. To be capable of perceiving sound. To receive news or information; learn: I heard about your accident. To consider, permit, or consent to something. Used only in the negative: I won't hear of your going! hear from To get a letter, telephone call, or transmitted communication from. hear from To be reprimanded by: If you don't do your homework, you're going to hear from me. hear, hear Used to express approval.