Definition of soapberry
: any of a genus (Sapindus of the family Sapindaceae, the soapberry family) of chiefly tropical woody plants; also : the fruit of a soapberry and especially of a tree (S. saponaria) that is saponin-rich and used as a soap substitute
First Known Use of soapberry
Seen and Heard
What made you want to look up soapberry? Please tell us where you read or heard it (including the quote, if possible).