"belonging to me," c. 1200, mi, reduced form of mine used before words beginning in consonants except h- (my father, but mine enemy), and from 14c. before all nouns. Always used attributively, mine being used for the predicate. As interjection, by 1825, probably a shortened form of my God!
an undecomposable elementary substance having certain recognizable qualities (opacity, conductivity, plasticity, high specific gravity, etc.), mid-13c., from Old French metal "metal; material, substance, stuff" (12c.), from Latin metallum "metal, mineral; mine, quarry," from Greek metallon "metal, ore" (senses found only in post-classical texts, via the notion of "what is got by mining"); originally "mine, quarry-pit," probably a back-formation from metalleuein "to mine, to quarry," a word of unknown origin. Perhaps related somehow to metallan "to seek after," but Beekes finds this "hardly convincing."
The concept was based on the metals known from antiquity: gold, silver, copper, iron, lead, and tin. As an adjective, "of or covered with metal," from late 14c. As short for heavy metal (rock music) by 1980. Metal-work "work, especially artistic work, in metal" is by 1724.
1520s, "the business or work of a miner," verbal noun from mine (v.1). From c. 1300 as "the undermining of walls or towers in a military attack." Mining-camp "temporary settlement for mining purposes" is by 1853, in a California context.
"sighting of land," 1620s, also "the first land 'made' on a sea voyage" (1883); from land (n.) + fall (v.) in the sense of "happen." A word from the days of imprecise nautical navigation.
Land-fall. The first land discovered after a sea voyage. Thus a good land fall implies the land expected or desired; a bad landfall the reverse. [John Hamilton Moore, "The New Practical Navigator," London, 1814]
Of hurricanes, by 1932.