Opposition or objection to an idea, plan, or proposal; resistance or dissent.
多くの住民が新しい道路計画に反対した。
Many residents opposed the new road plan.
親の反対を押し切って留学を決めた。
He decided to study abroad despite his parents' objection.
会議でその提案に強い反対の声が上がった。
Strong voices of opposition were raised against the proposal at the meeting.
The reverse, opposite, or contrary side or state; something that is inverse or facing the other way.
左と右は反対の方向だ。
Left and right are opposite directions.
表と裏は反対の面になる。
The front and back become opposite sides.
彼の意見は私と反対だが、議論は建設的だった。
His opinion is opposite to mine, but the discussion was constructive.