Definitions:

1. A person who holds extremely conservative beliefs or views. NOUN
   • The ultraconservatives in the legislature blocked the new environmental bill.
2. Extremely conservative, especially in politics, religion, or social values. ADJECTIVE
   • He holds ultraconservative views on education and gender roles.
3. Strongly resistant to change or liberal ideas. ADJECTIVE
   • The ultraconservative party opposed all forms of progressive reform.

Synonyms:

• extreme right-winger
• far-right
• hardliner
• reactionary
• right-wing extremist
• traditionalist