buzz

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To make a low droning or vibrating sound like that of a bee.
• intransitive verb To talk, often excitedly, in low tones.
• intransitive verb To be abuzz; hum.
• intransitive verb To move quickly and busily; bustle.
• intransitive verb To make a signal with a buzzer.
• intransitive verb To cause to buzz.
• intransitive verb To utter in a rapid, low voice.
• intransitive verb Informal To fly low over.
• intransitive verb To call or signal with a buzzer.
• intransitive verb To make a telephone call to.
• intransitive verb To give a buzzcut to.
• noun A vibrating, humming, or droning sound.
• noun A low murmur.
• noun A telephone call.
• noun A state of pleasant intoxication, as from alcohol.
• noun A state of stimulation or overstimulation, as from caffeine.
• noun Excited interest or attention.
• noun Rumor; gossip.
• noun A buzzcut.

from The Century Dictionary.

• To make a low humming sound, as bees; emit a sound like a prolonged utterance of z, as by a slow expiration of intonated or sonant breath between the tongue and the roof of the mouth or the upper teeth.
• To whisper buzzingly; speak with a low humming voice; make a low sibilant sound.
• To make known by buzzing.
• To whisper; spread or report by whispers; spread secretly.
• To share equally the last of a bottle of wine, when there is not enough for a full glass to each of the party.
• noun A continuous humming sound, as of bees.
• noun A confused humming sound, such as that made by a number of people busily engaged in conversation or at work; the confused humming sound of bustling activity or stir; hence, a state of activity or ferment: as, the buzz of conversation ceased when he appeared; my head is all in a buzz.
• noun A rumor or report.
• noun Gossamer.
• See buz.
• See buzzwig.
• Of an artificial fly, having the hackle wrapped closely under the wings.
• To move hurriedly or with fuss; run; fuss about: as, to buzz along; to buzz about; to buzz against a person.
• To pick pockets.
• To throw with violence.
• To drink (a bottle) till it is empty.
• noun A bur; prickly calyx.
• noun In angling, a beetle or its artificial imitation used as bait.

from the GNU version of the Collaborative International Dictionary of English.

• noun A continuous, humming noise, as of bees; a confused murmur, as of general conversation in low tones, or of a general expression of surprise or approbation.
• noun A whisper; a report spread secretly or cautiously.
• noun (Phonetics) The audible friction of voice consonants.
• transitive verb To sound forth by buzzing.
• transitive verb To whisper; to communicate, as tales, in an under tone; to spread, as report, by whispers, or secretly.
• transitive verb colloq. To talk to incessantly or confidentially in a low humming voice.
• transitive verb (Phonetics) To sound with a “buzz”.
• intransitive verb To make a low, continuous, humming or sibilant sound, like that made by bees with their wings. Hence: To utter a murmuring sound; to speak with a low, humming voice.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A continuous, humming noise, as of bees; a confused murmur, as of general conversation in low tones.