プログレッシブ和英中辞典(第4版)の解説
ゆうせい【優勢】
〔優越〕superiority；〔他のすべてに断然まさること〕predominance
優勢な 〔優位に立つ〕superior ((to))；〔支配的な〕predominant
敵は物量的に優勢であった
The enemy was superior to us materially.／The enemy had material superiority over us.／The enemy was far better supplied than we were.
議会では保守党が優勢を占めている
The conservative party holds sway in the Diet.／The Diet is dominated by the conservatives.
市長選で山田氏は最初から優勢を保った
Mr. Yamada had been in the lead from the start for the mayorship.
彼の説が優勢になってきている
His opinion has gained predominance.