What is the meaning of hear?

verb

• Perceive (sound) via the auditory sense.
• Get to know or become aware of, usually accidentally.
  • usage: "I learned that she has two grown-up children"; "I see that you have been promoted"
  • synonyms: learn, get word, get wind, pick up, find out, get a line, discover, see
• Examine or hear (evidence or a case) by judicial process.
  • usage: "The jury had heard all the evidence"; "The case will be tried in California"
  • synonyms: try
• Receive a communication from someone.
  • usage: "We heard nothing from our son for five years"
• Listen and pay attention.
  • usage: "Listen to your father"; "We must hear the expert before we make a decision"
  • synonyms: listen, take heed