early 14c., hathir, from Old English *hæddre, Scottish or northern England dialect name for Calluna vulgaris, probably altered by heath, but real connection to that word is unlikely [Liberman, OED]. Perhaps originally Celtic. As a fem. proper name little used in U.S. before 1935, but a top-15 name for girls born there 1971-1989.

1946 as an extreme snow condition on the U.S. prairie, from white as a verb + out (adv.). From 1977 as a liquid correction for paper.

early 14c., from lily + white (adj.); from 1903 with reference to whites-only segregation; 1961 as "irreproachable."

type of North American deer, 1872, from white (adj.) + tail (n.).

"heated to full incandescence," 1820, from white (adj.) + hot (adj.). White heat is from 1710; figurative sense of "state of intense or extreme emotion" first recorded 1839.

"white with a tinge of gray or yellow;" as an adjective, "almost the same as white," 1927, from off (prep.) + white (n.).

Old English snawhwit (glossing Latin niveus), from snow (n.) + white (adj.). Similar formation in Dutch sneeuwwit, Middle Low German snewhit, German schneeweiss, Old Norse snæhvitr, Swedish snöhvit, Danish snehvid. The fairy tale is so-called from 1885, translating German Schneewittchen in Grimm; the German name was used in English by 1858.

by 1911, perhaps 1909, from white (adj.) + collar (n.).

The white collar men are your clerks; they are your bookkeepers, your cashiers, your office men. We call them the 'white collar men' in order to distinguish them from the men who work with uniform and overalls and carry the dinner pails. The boys over on the West side got that name for them. It was supposed to be something a little better than they were. [Malcolm McDowell, quoted in Chicago Commerce, June 12, 1914]

White-collar crime attested by 1957 (there is a white-collar criminaloids from 1934).