red-letter day

noun

informal
: a very happy and important day

Dictionary Entries Near red-letter day

Cite this Entry

“Red-letter day.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/red-letter%20day. Accessed 5 Mar. 2024.

More from Merriam-Webster on red-letter day

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!