Dictionary definition · oppose
verb
- be against; express opposition to"We oppose the ban on abortion"
- fight against or resist strongly"The senator said he would oppose the bill"
- contrast with equal weight or force
- set into opposition or rivalry"let them match their best athletes against ours"
- act against or in opposition to"She reacts negatively to everything I say"
- be resistant to"The board opposed his motion"
Source: Open English WordNet (CC BY 4.0).