An emphatic response or statement is one made in a forceful way, because the speaker feels very strongly about what they are saying.
His response was immediate and emphatic.
他的回答迅速且断然。
If you are emphatic about something, you use forceful language that shows you feel very strongly about what you are saying.
The rebels are emphatic that this is not a surrender.
叛乱者坚称这不是投降。
An emphatic win or victory is one in which the winner has won by a large amount or distance.
Yesterday's emphatic victory was their fifth in succession.
昨天的大比分胜利是他们第五次的接连胜利。