If you set your face against something, you oppose it in a very determined way. Tricia wondered if he had ever considered moving, but heard that he had set his face against the idea. Both the government and the major rebel groups appear to have set their faces against a negotiated settlement to the conflict. Note: You often use this expression when you think someone is being unreasonable. Note: This expression is used several times in the Bible. When God `set His face against' someone who had sinned, He showed that He was angry with them.