hum /ˈhʌm/
 嗡嗡聲,哼聲,雜聲(vi.)發低哼聲(vt.)閉口哼歌,嗡嗡叫
 hum /ˈhəm/ 名詞
 哼鳴
 Hum, v. t.
 1. To sing with shut mouth; to murmur without articulation; to mumble; as, to hum a tune.
 2. To express satisfaction with by humming.
 3. To flatter by approving; to cajole; to impose on; to humbug. [Colloq. & Low]
 Hum v. i. [imp. & p. p. Hummed p. pr. & vb. n. Humming ]
 1. To make a low, prolonged sound, like that of a bee in flight; to drone; to murmur; to buzz; as, a top hums.
    Still humming on, their drowsy course they keep.   --Pope.
 2. To make a nasal sound, like that of the letter m prolonged, without opening the mouth, or articulating; to mumble in monotonous undertone; to drone.
 The cloudy messenger turns me his back,
 And hums.   --Shak.
 3.  To make an inarticulate sound, like h'm, through the nose in the process of speaking, from embarrassment or a affectation; to hem.
 4. To express satisfaction by a humming noise.
    Here the spectators hummed.   --Trial of the Regicides.
 Note: ☞ Formerly the habit of audiences was to express gratification by humming and displeasure by hissing.
 5. To have the sensation of a humming noise; as, my head hums, -- a pathological condition.
 Hum, n.
 1. A low monotonous noise, as of bees in flight, of a swiftly revolving top, of a wheel, or the like; a drone; a buzz.
    The shard-borne beetle with his drowsy hums.   --Shak.
 2. Any inarticulate and buzzing sound; as: (a) The confused noise of a crowd or of machinery, etc., heard at a distance; as, the hum of industry.
    But 'midst the crowd, the hum, the shock of men.   --Byron.
 (b) A buzz or murmur, as of approbation.
 3. An imposition or hoax.
 4.  An inarticulate nasal sound or murmur, like h'm, uttered by a speaker in pause from embarrassment, affectation, etc.
    These shrugs, these hums and ha's.   --Shak.
 5.  A kind of strong drink formerly used. [Obs.]
 Venous hum. See under Venous.
 Hum, interj.  Ahem; hem; an inarticulate sound uttered in a pause of speech implying doubt and deliberation.
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 hum
      n 1: the state of being or appearing to be actively engaged in an
           activity; "they manifested all the busyness of a pack of
           beavers"; "there is a constant hum of military
           preparation" [syn: busyness]
      2: an Islamic fundamentalist group in Pakistan that fought the
         Soviet Union in Afghanistan in the 1980s; now operates as
         a terrorist organization primarily in Kashmir and seeks
         Kashmir's accession by Pakistan [syn: Harkat-ul-Mujahidin,
          Harkat ul-Ansar, HUA, Harkat ul-Mujahedeen, Al
         Faran, Movement of Holy Warriors]
      3: a humming noise; "the hum of distant traffic" [syn: humming]
      v 1: sing with closed lips; "She hummed a melody"
      2: be noisy with activity; "This office is buzzing with
         activity" [syn: buzz, seethe]
      3: sound with a monotonous hum [syn: thrum]
      4: make a low continuous sound; "The refrigerator is humming"
      [also: humming, hummed]