Stone Age

name

The Stone Age is a period in human history characterized by the use of stone tools.

意味（1）

(archaeology, paleontology) A broad prehistoric period during which humans widely used stone for toolmaking.

意味（2）

(figuratively, informal) Any extremely primitive or undeveloped era.

If they attack our country, we'll bomb them back to the Stone Age!

意味（3）

(figuratively) The time a particular field was introduced and was in its earliest stages of development.