We've found 4 definitions containing the term humming (3.69 seconds):

«definition»  What does humming mean?                a humming noise the act of singing with closed lips

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		WEHU	White- Eared HUmmingbird	Medical » Veterinary
		HUMC	Hummingbird Communication	Business » NASDAQ Symbols
		HCL	Hummingbird Communications Ltd	Business » Firms
		QBH	Query By Humming	Computing » Databases
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