The Collaborative International Dictionary of English v.0.48:

Bud \Bud\, v. i. [imp. & p. p. Budded; p. pr. & vb. n.
   Budding.]
   1. To put forth or produce buds, as a plant; to grow, as a
      bud does, into a flower or shoot.
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   2. To begin to grow, or to issue from a stock in the manner
      of a bud, as a horn.
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   3. To be like a bud in respect to youth and freshness, or
      growth and promise; as, a budding virgin. --Shak.
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   Syn: To sprout; germinate; blossom.
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