Definition of black locust
: a tall tree (Robinia pseudoacacia) of eastern North America with pinnately compound leaves, drooping racemes of fragrant white flowers, and strong stiff wood
First Known Use of black locust
Learn More about black locust
Britannica.com: Encyclopedia article about black locust
Seen and Heard
What made you want to look up black locust? Please tell us where you read or heard it (including the quote, if possible).