tree lupine

noun

: an evergreen shrub (Lupinus arboreus) of the Pacific coast of the U.S. that has showy yellow or blue to violet flowers and is naturalized in New Zealand where it is used as a sand binder

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!