Definitions of old man's beard:

  • noun:   common climber of eastern North America that sprawls over other plants and bears numerous panicles of small creamy white flowers
  • noun:   dense festoons of greenish-gray hairlike flexuous strands anchored to tree trunks and branches by sparse wiry roots; southeastern United States and West Indies to South America
  • noun:   vigorous deciduous climber of Europe to Afghanistan and Lebanon having panicles of fragrant green-white flowers in summer and autumn