Not specified; not thoroughly explained or detailed; not adequately commented.
"The report contained many unspecified details about the project timeline, leaving readers unable to understand the exact schedule."
In plain English: Unspecified means something is left undefined because no specific details were given about it yet.
"The report left several important details unspecified, so we had to make our own guesses about what happened next."
Usage: Use unspecified to describe details, conditions, or causes that have been left undefined rather than explicitly stated in text or conversation. It is often preferred over synonyms like "unknown" when the information exists but has simply not yet been defined by the speaker or writer.
The word unspecified is formed by adding the prefix un- to specified to indicate a lack of specification. It entered English as a straightforward negation of the term specified without any shift in core meaning.