nail down

phrasal verb
nailed down; nailing down; nails down

Definition of nail down

1 : to make (something, such as a victory) certain to happen They need to score another touchdown to nail down the victory.
2 : to find out or identify (something) exactly Her doctors haven't yet been able to nail down a diagnosis. They're trying to nail down the cause of our network problems.
3 : to make (something) definite or final nail down a decision

Learn More about nail down

Statistics for nail down

Cite this Entry

“Nail down.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nail%20down. Accessed 11 May. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on nail down

Nglish: Translation of nail down for Spanish Speakers

Comments on nail down

What made you want to look up nail down? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Star Wars Words Quiz

  • cu jedi training
  • The bounty portion of bounty hunters (such as Boba Fett) comes from a Latin word meaning
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

TAKE THE QUIZ
Love words? Need even more definitions?

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