To attempt to stop the progression of; to resist or antagonize by physical means, or by arguments, etc.; to contend against.
There is still time to oppose this plan.
To object to.
Many religious leaders oppose cloning humans.
To present or set up in opposition; to pose.
They are opposed to any form of hierarchy.
To place in front of, or over against; to set opposite; to exhibit.
That opposes or oppose; on the opposite side.
opposing armies