资料来源 : Webster's Revised Unabridged Dictionary (1913)

Broaden \Broad"en\, v. t. [imp. & p. p. {Broadened}; p. pr. &
   vb. n. {Broadening}.] [From {Broad}, a.]
   To grow broad; to become broader or wider.

         The broadening sun appears.              --Wordsworth.