1. a person who zealously advocates a particular ideology
Usage: less common variant of ideologue

Examples

• The political idealogue refused to compromise on any issue.
• She was dismissed as an idealogue who couldn’t see practical solutions.
• The debate featured idealogues from both sides of the spectrum.
• Critics called him a rigid idealogue rather than a thoughtful leader.
• The idealogue’s speeches were full of theoretical principles but lacked real-world application.