conservative in WordNet English dictionary

1. conforming to the standards and conventions of the middle class
   "a bourgeois mentality"
   bourgeois  conservative  materialistic 
   
2. unimaginatively conventional
   "a colorful character in the buttoned-down, dull-grey world of business"- Newsweek
   button-down  buttoned-down  conservative 
   
3. avoiding excess
   "a conservative estimate"
   cautious  conservative 
   
4. resistant to change
   conservative 
   
5. having social or political views favoring conservatism
   conservative 
   

1. a person who is reluctant to accept changes and new ideas
   conservative  conservativist