POLO can stand for different things depending on the context. Here are a few common meanings:

• Professionals Organized For Leadership And Opportunity
• Parallel Optical Links Organization
• Polycrystalline-Silicon-on-Oxide (solar cells)
• People Often Laugh Openly
• Pants Off Legs Open (informal/humorous)
• Pacific Operations Liaison Office
• Philippine Overseas Labour Office

If you can share the specific context (e.g., a company, a document, a field like technology, crops, or slang), I can pinpoint the most likely meaning.