1
- a long, loud, doleful cry uttered by an animal such as a dog or wolf（狗、狼等）嚎叫; 悽厉的长嚎; 狂吠。
1.1
- a loud cry of pain, fear, anger, amusement, or derision（痛苦、恐惧、生气、欢乐或嘲笑的）吼叫; 咆哮; 怒叫; 嚎哭, 哀号：
he let out a howl of anguish
他发出一声痛苦的哀号
figurative 〈喻〉I got howls of protest from readers.
读者冲着我发出抗议的怒吼声。
1.2
- in sing. a prolonged wailing noise such as that made by a strong wind（劲风的）呼啸, 怒号：
they listened to the howl of the gale.
他们聆听着大风的呼啸声。
1.3
- Electronics a wailing noise in a loudspeaker due to electrical or acoustic feedback【电子】啸声, 嘷鸣, 颤噪效应。
no obj.
1- make a howling sound嚎叫, 怒吼, 呼啸：
he howled in agony
他痛苦地怒吼
the wind howled around the house.
风在房屋周围怒号。
1.1
- weep and cry out loudly嚎啕大哭：
a baby started to howl.
婴儿开始嚎啕大哭。
1.2
- with obj.
howl someone down
shout in disapproval in order to prevent a speaker from being heard以愤怒（或嘲笑等）的吼叫声压倒…的说话声; 以吼叫声来影响（或驱赶等）： they howled me down and called me a chauvinist.
他们嘘声一片, 把我轰下了台, 称我为沙文主义者。
词源
Middle English houle (verb), probably imitative.