Meaning of the word stratum in English

What does stratum mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

stratum

US /ˈstreɪt̬.əm/
UK /ˈstrɑː.təm/
"stratum" picture

Noun

1.

a layer or a series of layers of rock in the ground

Example:
Geologists studied the different strata of rock to understand the Earth's history.
The archaeological dig revealed several distinct cultural strata.
2.

a level or class to which people are assigned according to their social status, education, or income

Example:
The study examined how different social strata were affected by the new policy.
He rose from the lowest stratum of society to become a successful entrepreneur.