1. A fast-growing Asian tree with compound leaves and winged fruits, widely planted as an ornamental but often considered invasive in North America.
Usage: Also called tree of heaven.; Scientific name: Ailanthus altissima.

Examples

• The ailanthus tree spread rapidly through the city's vacant lots.
• Many municipalities struggle to control ailanthus because it grows so quickly.
• The ailanthus has feathery compound leaves that can reach two feet in length.
• Despite its ornamental appeal, the ailanthus is now classified as an invasive species in many regions.
• The winged seeds of the ailanthus are easily dispersed by wind.