taru-adjective, adverb taking the 'to' particle
evident; clear; distinct; plain
A somewhat formal, literary word used to describe something that is unmistakably obvious or clearly distinguishable. Often appears as 歴然とした or 歴然と.
両者の差は歴然としている。
The difference between the two is clear.
The evidence was plainly there.
The difference in skill between the two is plain to see.
It is an undeniable fact that he is the culprit.
Clear traces of a struggle remained at the scene.