Definition of oleaster
: any of several plants (genus Elaeagnus of the family Elaeagnaceae, the oleaster family) having alternate leaves and small often fragrant flowers with four stamens; especially : russian olive
Origin and Etymology of oleaster
Middle English, from Latin, from olea
First Known Use: 14th centurySee Words from the same year
Seen and Heard
What made you want to look up oleaster? Please tell us where you read or heard it (including the quote, if possible).