What does anarchy mean in pols?

Excuse me, could you please elaborate on the concept of anarchy as it pertains to the field of politics? I'm curious to understand the specific meaning and implications of this term in a political context. Could you provide a clear and concise definition, highlighting any key characteristics or aspects that distinguish it from other forms of governance? Additionally, I'd be interested to know if there are any historical examples or modern-day applications of anarchic political systems that you could share.