What does pre-history mean?

pre what we know went on we guess then or have theories like man originated in Africa now new evidence says he didn't

What was happening before writing, so, about 10,000 years ago, when humans stopped being hunter-gatherers, and began farming, and living in communities.

It means before writing.

Pre-history is the period of human development before the invention of writing.

I'm older than dirt, so that must be before me.

As you well know it varies right across the globe because not all cultures adopted a method for recording history at the same time.

Before written history.

Usually it means before the Roman Empire. Rome is generally considered to be the period when "Officially Recorded History" begins.

Pre-history means the period of human activity before written language. History is primarily based on the study of written documents, whereas Archaeology studies "pre-history" before written documents were made.