definite

The weather forecast gave a definite warning that a thunderstorm would arrive at 4 PM.

(Chinese) 天气预报发出了明确警告，雷暴将在下午4点到达。

We need a definite answer by tomorrow morning so we can book the flight tickets.

(Chinese) 我们需要在明天早上得到一个确定的答复，以便预订机票。