Definition of household word
: a common word or phrase : byword penicillin has become a new household word — W. E. Swinton
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!
First Known Use of household word
Seen and Heard
What made you want to look up household word? Please tell us where you read or heard it (including the quote, if possible).