a small protuberance on the stem or branches of a plant, containing the rudiments of future leaves, flowers, or stems; an undeveloped branch or flower.-a small protuberance on certain low forms of animals and vegetables which develops into a new organism, either free or attached. see hydra.-to put forth or produce buds, as a plant; to grow, as a bud does, into a flower or shoot.-to begin to grow, or to issue from a stock in the manner of a bud, as a horn.-to be like a bud in respect to youth and freshness, or growth and promise; as, a budding virgin.-to graft, as a plant with another or into another, by inserting a bud from the one into an opening in the bark of the other, in order to raise, upon the budded stock, fruit different from that which it would naturally bear.