Definition
A prospect matching your ICP who hasn't engaged with any outreach yet, the starting point of a sequence, not a signal that they won't ever respond.
Treating a cold lead as a lost cause after one unanswered email is the most common way outbound teams undersell their own pipeline. Most replies come from the second, third, or fourth touch in a sequence, not the first, which is exactly why a real cadence exists instead of a single email.
Where this comes from
Read: Cold Email Sequence Templates That Get Replies