The worst (in terms of quality or degree); the most unfavorable among options.
今回の試合はチームにとって最悪の結果になった。
This match resulted in the worst outcome for the team.
彼女の評価はクラスで最悪だった。
Her assessment was the worst in the class.
Colloquially used as an exclamation or adjective meaning 'horrible' or 'awful'; expresses displeasure or shock.
あの店のサービス、最悪だったよ。
The service at that store was terrible.
彼の冗談は最悪で、誰も笑わなかった。
His joke was awful; no one laughed.
最悪、明日の飛行機が飛ばなかったらどうする？
Terrible thought — what if tomorrow's flight doesn't take off?
As an adverbial phrase meaning 'in the worst case' or 'if worst comes to worst'.
最悪、電車が止まったらタクシーで行きます。
If worst comes to worst and the train stops, I'll take a taxi.
最悪の場合は計画を中止することになるだろう。
In the worst case, the plan will have to be canceled.