(hummed, humming)no obj.
1
- make a low, steady continuous sound like that of a bee发连续低沉的声音（如蜜蜂的嗡嗡声）：
the computers hummed.
计算机发出嗡嗡声。
1.1
- sing with closed lips哼曲子：
he hummed softly to himself
他一个人轻轻地独自哼着曲子
with obj. she was humming a cheerful tune.她哼着一首快乐的曲子。
1.2
- (of a place) be filled with a low, steady continuous sound（地方）发嘈杂声：
the room hummed with an expectant murmur.
满怀期待的低语声充斥了整间屋子。
1.3
- informal be in a state of great activity〈非正式〉忙碌, 活跃：
the repair shops are humming as the tradesmen set about their various tasks.
手艺人各自开始着手干活时, 修理店一片忙碌。
2
- Brit. informal smell unpleasant〈英, 非正式〉发出难闻的气味, 发臭：
when the wind drops this stuff really hums.
风势减弱时, 这东西的味道的确很难闻。
in sing.
1- a low, steady continuous sound连续低沉的声音：
the hum of insects
昆虫的嗡嗡声
a low hum of conversation.
嗡嗡的低声交谈声。
1.1
- an unwanted low-frequency noise in an amplifier caused by variation of electric current, especially the alternating frequency of the mains（扩音器的）低频噪声, 低频干扰声。
短语
hum and haw（或ha）
- Brit. hesitate; be indecisive〈英〉犹豫不决, 优柔寡断。
派生词
hummable
adjectivehummer
noun词源
late Middle English: imitative.
- used to express hesitation or dissent用于表示犹豫或不同意嗯, 呣, 哼。
词源
mid 16th cent.: imitative; related to the verb HUM1.