1. [v]  divulge information or secrets; spill the beans; "Be careful--his secretary talks"
2. [v]  make a whining, ringing, or whistling sound; "the kettle was singing"; "the bullet sang past his ear"
3. [v]  to make melodious sounds; "The nightingale was singing"
4. [v]  produce musical tones with the voice; "She was singing while she was cooking"; "My brother sings very well"
5. [v]  deliver by singing; "Sing Christmas carols"

Sing
Sing

more details ...

1. \Sing\, v. i. [imp. {Sung}or {Sang}; p. p. {Sung}; p. pr. &
   vb. n. {Singing}.] [AS. singan; akin to D. zingen, OS. & OHG.
   singan, G. singen, Icel. syngja, Sw. sjunga, Dan. synge,
   Goth. siggwan, and perhaps to E. say, v.t., or cf. Gr. ???
   voice. Cf. {Singe}, {Song}.]
   1. To utter sounds with musical inflections or melodious
      modulations of voice, as fancy may dictate, or according
      to the notes of a song or tune, or of a given part (as
      alto, tenor, etc.) in a chorus or concerted piece.
            The noise of them that sing do I hear. --Ex. xxxii.
                                                  18.
   2. To utter sweet melodious sounds, as birds do.
            On every bough the briddes heard I sing. --Chaucer.
            Singing birds, in silver cages hung.  --Dryden.
   3. To make a small, shrill sound; as, the air sings in
      passing through a crevice.
            O'er his head the flying spear Sang innocent, and
            spent its force in air.               --Pope.
   4. To tell or relate something in numbers or verse; to
      celebrate something in poetry. --Milton.
            Bid her . . . sing Of human hope by cross event
            destroyed.                            --Prior.
   5. Ti cry out; to complain. [Obs.]
            They should sing if thet they were bent. --Chaucer.
   

2. \Sing\, v. t.
   1. To utter with musical infections or modulations of voice.
            And they sing the song of Moses, the servant of God,
            and the song of the Lamb.             --Rev. xv. 3.
            And in the darkness sing your carol of high praise.
                                                  --Keble.
   2. To celebrate is song; to give praises to in verse; to
      relate or rehearse in numbers, verse, or poetry. --Milton.
            Arms and the man I sing.              --Dryden.
            The last, the happiest British king, Whom thou shalt
            paint or I shall sing.                --Addison.
   3. To influence by singing; to lull by singing; as, to sing a
      child to sleep.
   4. To accompany, or attend on, with singing.
            I heard them singing home the bride.  --Longfellow.