There does not appear to be a commonly known or standard dictionary definition for the term "hadst dry run" specifically. However, as the phrase contains a combination of words with individual meanings, we can define it by breaking it down:
"Hadst" is an archaic form of the verb "have" in the second person singular past tense. It indicates possession, ownership, or experience of something in the past.
"Dry run" is a term used to describe a practice or rehearsal run of a particular activity or event without the presence of the usual or intended elements, such as without using actual people, materials, or resources. It is typically done to test or demonstrate the effectiveness of a plan or procedure before its actual implementation.
Therefore, combining these two terms, "hadst dry run" might infer to a practice or rehearsal that was done in the past, utilizing simulated or alternative resources or methods, rather than the real or intended ones. This could relate to testing or examining the viability, efficiency, or success of a plan, strategy, or process.
It is important to note that without a specific context or source reference, this interpretation is based on the individual meanings of the constituent words rather than an established definition.
