IPA: //juːnɪˈfɔːrmɪˌtɛəriən//
KK: /junɪfɔrmɪˈtɛrɪən/
Relating to the idea that the same natural processes that operate in the present have always operated in the past, especially in geology.
The uniformitarian theory suggests that the Earth's features were shaped by the same processes we observe today.
A person who believes in the idea that the same natural processes that operate in the present have always operated in the past, shaping the Earth over time.
The uniformitarian presented evidence to support his theory about the Earth's geological changes.
Uniformitarian → It is formed from "uni-" (meaning one or single), "form" (from Latin "forma", meaning shape or structure), and "-itarian" (from Latin "-itarianus", meaning relating to or characterized by). The word refers to the principle that the same natural laws and processes that operate in the universe now have always operated in the past and apply everywhere in the universe.
Think of 'one' ('uni-') shape or structure ('form') that is consistent over time, which helps you remember that 'uniformitarian' refers to the idea that the same processes have always shaped the Earth.