million years
Deep time unit
A million years is an immense span of time, used literally in geology and evolutionary biology to describe deep time: The dinosaurs died out sixty-six million years ago.
In casual speech, it's hyperbole for any long period: I haven't seen you in a million years.
The phrase not in a million years means absolutely never: I wouldn't do that in a million years.
- eonsImmense spans of time
- geologicalOf Earth's physical structure
- geological timeEarth's age measured in eras
- ancientVery old indeed
- prehistoricBefore documented civilization
prehistoric era · dinosaurs · fossils · fossil record · evolution · mass extinction · epochs · deep time · Jurassic · extinction · carbon dating · sediment · ice age · Cambrian · primordial · aeons · dawn of time · timescale
million yearsinstant
Briefest unit of time
moment · second · split second · nanosecond · millisecond
million, millions, millionth, millionaire, millionaires, millennial, millennium, millennia, year