Definition of underdo
: to do less than one can or than is requisite or proper
1 : to do less thoroughly than one can or should; especially : to cook (as meat) rare
2 obsolete : underact
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!
Origin and Etymology of underdo
1under + do
Seen and Heard
What made you want to look up underdo? Please tell us where you read or heard it (including the quote, if possible).