Longman Dictionary of Contemporary English
Wiktionary
a. (context idiomatic English) Detailing every action or occurrence completely. n. (context idiomatic English) An account, description, or commentary including every detail of the action or event.
WordNet
adj. providing great detail; "a blow-by-blow account of the movie"
Usage examples of "blow-by-blow".
The analyzer would have to shout blow-by-blow tactical instructions to Alaskan ground forces as well as direct the air armada.
Rather fun to do, actually, and oh, well, you don't need a blow-by-blow description of the process right now.
All of the Judge's friends had heard about the night's adventure and they wanted a blow-by-blow description.
Now I’m not asking you for a blow-by-blow, but I’ve been mugged, my boyfriend’s gotten himself knifed, my best clothes have been trashed, my mouth hurts, and I’m likely to miss my connection to Betazed.