Definition of nail something down in English:

nail something down

1Identify something precisely: something seems unexpected—I can’t nail it down, but it makes me uneasy
More example sentences
  • I'll keep thinking about it and see if I can nail it down a little more precisely.
  • But the story by now has become a rollercoaster, and I am an agnostic until someone nails it down.
  • And because it's of course in our backyard - we're based down here - we had some very good sources and we were able to nail this story down.
2Secure an agreement: the company has finally nailed down the agreement with its distributors
More example sentences
  • He has had opportunities to win the job but hasn't come close to nailing it down.
  • Until common standards, definitions and interpretations are nailed down and agreed, participants in future talks may as well be speaking two different languages.
  • That's the great danger that nothing about this handover has been nailed down, nothing that - you can't say the ink has not dried yet - the document hasn't been written yet.
See parent entry: nail

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up