The Collaborative International Dictionary of English v.0.48:

Hear \Hear\ (h[=e]r), v. t. [imp. & p. p. Heard (h[~e]rd); p.
   pr. & vb. n. Hearing.] [OE. heren, AS,. hi['e]ran,
   h[=y]ran, h[=e]ran; akin to OS. h[=o]rian, OFries. hera,
   hora, D. hooren, OHG. h[=o]ren, G. h["o]ren, Icel. heyra, Sw.
   h["o]ra, Dan. hore, Goth. hausjan, and perh. to Gr.
   'akoy`ein, E. acoustic. Cf. Hark, Hearken.]
   1. To perceive by the ear; to apprehend or take cognizance of
      by the ear; as, to hear sounds; to hear a voice; to hear
      one call.
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            Lay thine ear close to the ground, and list if thou
            canst hear the tread of travelers.    --Shak.
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            He had been heard to utter an ominous growl.
                                                  --Macaulay.
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   2. To give audience or attention to; to listen to; to heed;
      to accept the doctrines or advice of; to obey; to examine;
      to try in a judicial court; as, to hear a recitation; to
      hear a class; the case will be heard to-morrow.
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   3. To attend, or be present at, as hearer or worshiper; as,
      to hear a concert; to hear Mass.
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   4. To give attention to as a teacher or judge.
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            Thy matters are good and right, but there is no man
            deputed of the king to hear thee.     --2 Sam. xv.
                                                  3.
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            I beseech your honor to hear me one single word.
                                                  --Shak.
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   5. To accede to the demand or wishes of; to listen to and
      answer favorably; to favor.
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            I love the Lord, because he hath heard my voice.
                                                  --Ps. cxvi. 1.
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            They think that they shall be heard for their much
            speaking.                             --Matt. vi. 7.
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   Hear him. See Remark, under Hear, v. i.

   To hear a bird sing, to receive private communication.
      [Colloq.] --Shak.

   To hear say, to hear one say; to learn by common report; to
      receive by rumor. [Colloq.]
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The Collaborative International Dictionary of English v.0.48:

Hear \Hear\, v. i.
   1. To have the sense or faculty of perceiving sound. "The
      hearing ear." --Prov. xx. 12.
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   2. To use the power of perceiving sound; to perceive or
      apprehend by the ear; to attend; to listen.
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            So spake our mother Eve, and Adam heard,
            Well pleased, but answered not.       --Milton.
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   3. To be informed by oral communication; to be told; to
      receive information by report or by letter.
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            I have heard, sir, of such a man.     --Shak.
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            I must hear from thee every day in the hour. --Shak.
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   To hear ill, to be blamed. [Obs.]

            Not only within his own camp, but also now at Rome,
            he heard ill for his temporizing and slow
            proceedings.                          --Holland.

   To hear well, to be praised. [Obs.]
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   Note: Hear, or Hear him, is often used in the imperative,
         especially in the course of a speech in English
         assemblies, to call attention to the words of the
         speaker.
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               Hear him, . . . a cry indicative, according to
               the tone, of admiration, acquiescence,
               indignation, or derision.          --Macaulay.
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WordNet (r) 3.0 (2006):

hear
    v 1: perceive (sound) via the auditory sense
    2: get to know or become aware of, usually accidentally; "I
       learned that she has two grown-up children"; "I see that you
       have been promoted" [syn: learn, hear, get word, get
       wind, pick up, find out, get a line, discover,
       see]
    3: examine or hear (evidence or a case) by judicial process;
       "The jury had heard all the evidence"; "The case will be
       tried in California" [syn: hear, try]
    4: receive a communication from someone; "We heard nothing from
       our son for five years"
    5: listen and pay attention; "Listen to your father"; "We must
       hear the expert before we make a decision" [syn: listen,
       hear, take heed]