Definitions

1. noun

One who opposes or resists; an opponent or adversary, especially in a particular field or activity.

“The environmental illeist fought tirelessly against the construction of the new factory.”

2. noun

A person who denies or rejects something, especially a scientific theory or concept.

“The illeist of the theory of evolution sparked heated debates in the academic community.”

3. noun

A person who opposes or resists a particular idea or movement.

“The illeist of the feminist movement spoke out against its goals and ideals.”