Bour'geon intransitive verb [ Middle English burjoun a bud, burjounen to bud, French bourgeon a bud, bourgeonner to bud; confer Old High German burjan to raise.] To sprout; to put forth buds; to shoot forth, as a branch. « Gayly to bourgeon and broadly ... Found on http://www.encyclo.co.uk/webster/B/86