Question

what is meaning of Era

Answer 1

An era is a commonly used word for a long period of time. When used in science, for example geology, an era denotes a clearly defined period of time of arbitrary but well-defined length, such as for example the Mesozoic Era from 252 Ma–66 Ma, delimited by a start event and an end event.

Answer 2

Era means a period of time known for particular events or developments.