Synonyms of 'to the letter'
▷ See letter
preciselyDictionary, strictly, literally
She obeyed his instructions to the letter.
Copyright © 2016 by HarperCollins Publishers. All rights reserved.
The test can accurately predict what a bigger explosion would do.
Can you describe exactly what he looked like?
Thesaurus for to the letter from the Collins English Thesaurus
If you say that someone carries out instructions to the letter , you mean that they do exactly what they are told to do, paying great attention to every detail.