"Previous thread" refers to a previous conversation or discussion that took place before the current one. It means referring back to the previous topic or continuing a previous line of thought.
Sentences with «previous thread»
We have discussed both the issues before in previous threads where you were proven wrong. (cheersandgears.com)
After a dozen comments by the same commenter in a thread that have basically been given in previous threads over and over. (judithcurry.com)