elderflowernoun [ C or U ]
/ˈel.dəˌflaʊ.ər//ˈel.dɚˌˈflaʊ.ɚ/the white flower of the elderberry tree:
Jams and cordials can be scented with elderflower.
She adds elderflowers to the gooseberries before cooking them.
a traditional English soft drink known as "elderflower champagne"