prehistory

noun

Prehistory is the period of time before written records.

意味（1）

The time before written records in any area of the world; the events and conditions of those times.

意味（2）

The study of those times.

意味（3）

(humorous, hyperbolic) Any past time (even recent) treated as such a distant, unknowable era.

I was a town boy through and through. The country belonged to a vague pre-history.

意味（4）

(often as pre-history) The history leading up to some event, condition, etc.

Psychologists... are mostly bad historians, inventing—as Freud has done—their pre-history to suit their theories.