1819, "to sound as metal when struck," possibly abstracted from ding-dong (1550s), which is of imitative origin. The meaning "to deal heavy blows" is c. 1300, probably from Old Norse dengja "to hammer," perhaps also imitative. Meaning "dent" is 1960s. Related: Dinged; dinging.
"drop-shot," in lawn tennis, 1939, probably somehow imitative. As a verb by 1942. Related: Dinked; dinking.
"one who is crazy," 1940, from earlier adjective (1935), from noun meaning "the sound of little bells" (1894), ultimately imitative of the tinkling sound (by 1848; see ding (v.)). The extended senses are from the notion of hearing bells in the head.
Old English dynt "blow dealt in fighting" (especially by a sword), from Proto-Germanic *duntiz (source also of Old Norse dyntr "blow, kick"), a word well represented only in Germanic and of disputed etymology. Phrase by dint of "by force of, by means of," is early 14c.
1736, in Kentish dialect, "dirty, foul," a word of uncertain origin, but perhaps related to dung. Meaning "soiled, tarnished, having a dull, brownish color" (from grime or weathering) is by 1751; hence "shabby, shady, drab" (by 1855). The noun dinge "dinginess" (1816) is a back-formation; as a derogatory word for "black person, Negro," by 1848. Related: Dingily; dinginess.
1888, "hard work," Australian slang, of unknown origin, perhaps from Lincolnshire dialect. Adjectival meaning "honest, genuine" is attested from 1916. Phrase fair dinkum "fair play" is attested by 1894.
c. 1400, "feasting, a feast," verbal noun from dine (v.). Dining-room "room in which principal meals are eaten" is attested from c. 1600. The railroad dining-car is from 1838.