>>285
英英にはそんな意味は載ってないです

excuse
noun [countable]

1 a reason that you give to explain careless or offensive behaviourexcuse for (doing) something

2 a reason that you invent to explain an action and to hide your real intentions

3 → there is no excuse for something

4 → make your excuses

5 → a poor/rotten etc excuse for something

6 (American English)
a note written by your doctor or one of your parents saying that you were ill on a particular day
SYN sick note (British English)

で、3のthere is no excuse for somethingの間違いかな？とも思ったんですが、それは

used to say that someone’s behaviour is too bad to be explained or accepted

こんな意味なので、文意と合わないし、単純に言い訳って意味でいいんじゃないですかね