Definition of double–o
: a close examination or inspection gave the two strangers the well-known double-o — Walker Matheson
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!
Origin and Etymology of double–o
so called from the two O's in once-over
Seen and Heard
What made you want to look up double–o? Please tell us where you read or heard it (including the quote, if possible).