a whistle used to train dogs that makes a sound that is too high for humans to hear A dog whistle blows at a frequency that is beyond the sensitivity of the human ear. 狗哨子的吹响频率超出了人耳的灵敏度。
a political message that is only intended for and heard by a particular group of people He made use of the dog whistle on issues like immigration and crime. 他在移民和犯罪等问题上利用了狗哨。 dog whistle politics 狗哨政治