Source : Webster's Revised Unabridged Dictionary (1913)

Become \Be*come"\, v. i. [imp. {Became}; p. p. {Become}; p. pr.
   & vb. n. {Becoming}.] [OE. bicumen, becumen, AS. becuman to
   come to, to happen; akin to D. bekomen, OHG.a piqu["e]man,
   Goth. biquiman to come upon, G. bekommen to get, suit. See
   {Be-}, and {Come}.]
   1. To pass from one state to another; to enter into some
      state or condition, by a change from another state, or by
      assuming or receiving new properties or qualities,
      additional matter, or a new character.

            The Lord God . . . breathed into his nostrils the
            breath of life; and man became a living soul. --Gen.
                                                  ii. 7.

            That error now which is become my crime. --Milton.

   2. To come; to get. [Obs.]

            But, madam, where is Warwick then become! --Shak.

   {To become of}, to be the present state or place of; to be
      the fate of; to be the end of; to be the final or
      subsequent condition of.

            What is then become of so huge a multitude? --Sir W.
                                                  Raleigh.

Becoming \Be*com"ing\, a.
   Appropriate or fit; congruous; suitable; graceful; befitting.

         A low and becoming tone.                 --Thackeray.

   Note: Formerly sometimes followed by of.

               Such discourses as are becoming of them.
                                                  --Dryden.

   Syn: Seemly; comely; decorous; decent; proper.

Becoming \Be*com"ing\, n.
   That which is becoming or appropriate. [Obs.]

Source : WordNet®

becoming
     adj 1: according with custom or propriety; "her becoming modesty";
            "comely behavior"; "it is not comme il faut for a
            gentleman to be constantly asking for money"; "a
            decent burial"; "seemly behavior" [syn: {comely}, {comme
            il faut}, {decent}, {decorous}, {seemly}]
     2: displaying or setting off to best advantage; "a becoming new
        shade of rose"; "a becoming portrait"