1869, to denote the shape of the letter V. As a type of engine, by 1915.
late 14c., hommen "make a murmuring sound to cover embarrassment," later hummen "to buzz, drone" (early 15c.), probably of imitative origin. Sense of "sing with closed lips" is first attested late 15c.; that of "be busy and active" is 1884, perhaps on analogy of a beehive. Related: Hummed.
expression of boredom, by 1906. As an adjective, by 1956.
"make a buzzing noise," 1865, from Latin bombinare, corrupted from bombitare "to hum, buzz," from bombus "a deep, hollow sound; hum, buzz," echoic. Also sometimes bombilate. Related: Bombinated; bombinating.
"routine, monotonous, dull, commonplace," 1550s, probably a reduplication of hum. As a noun, "monotony, tediousness," from 1727; earlier it meant "dull person" (1590s).
1948, shortened form of television (q.v.). Spelled out as tee-vee from 1949. TV dinner (1954), made to be eaten from a tray while watching a television set, is a proprietary name registered by Swanson & Sons, Omaha, Nebraska, U.S.
representative of a sound made during contemplation or showing mild disapproval, attested from 1868, but this is probably a variation of the hum attested in similar senses from 1590s.
"murmuring, sighing, whispering," 1791, from Latin susurrantem (nominative susurrans), present participle of susurrare "to hum, murmur" (see susurration). Susurrous (adj.), "of the nature of a whisper, full of murmurs" is from 1824.