How to define and identify lessons learned?

Dear EvalForward colleagues, As M&E professionals, we are often requested to identify and consolidate “lessons learned”. From my experience, there is not a shared understanding/ definition of what a lesson learned is. Often I come across lessons that sound like findings, conclusions, or sometimes even like recommendations and therefore belong somewhere else. I would be interested to learn from this community: which is the definition of lesson learned that you adopt or one you find useful?

How to define and identify lessons learned?

Best Practices For Preparing a Lessons Learned Document

Lessons Learned Template Guide Plus Examples

Lessons Learned in Project Management: Definition, Example, and Template

Introduction, Public–Private Partnerships: What Are the Lessons Learned?

Solved 3) When applied to project management, human resource

Lessons Learned in Project Management – Example and Templates

How to define and identify lessons learned?

10 Lessons Learned As a Startup Entrepreneur

Knoco stories: The 3 steps of the lessons learned loop

Project Management Lessons Learned

Lessons Learned: Taking it to the Next Level - PDF Free Download

Lessons Learned Meetings: The Easy 6-Step Process for Facilitators