Definition of secondary rainbow
: a rainbow that is concentric with and near but somewhat larger and fainter than a primary rainbow and that differs from it in formation in that there are two internal reflections and the red is seen on the inside edge of the bow
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.
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up secondary rainbow? Please tell us where you read or heard it (including the quote, if possible).