- supporting, conforming to, or derived from a theory or doctrine about uniformity, especially on the subject of geology.
- Geology. of or relating to the thesis that processes that operated in the remote geological past are not different from those observed now.
- a person who accepts or supports a uniformitarian theory.
- of or relating to uniformitarianism
- of, characterized by, or conforming to uniformity
- a supporter of a theory of uniformity or of uniformitarianism