metal

1. (heading) Chemical elements or alloys, and the mines where their ores come from.
2. A light tincture used in a coat of arms, specifically argent and or.
3. Molten glass that is to be blown or moulded to form objects.
4. A category of rock music encompassing a number of genres (including thrash metal, death metal, heavy metal, etc.) characterized by strong drum-beats and distorted guitars.
5. The substance that constitutes something or someone; matter; hence, character or temper; mettle.
6. The effective power or calibre of guns carried by a vessel of war.
7. (in the plural) The rails of a railway.
8. (travel) The actual airline operating a flight, rather than any of the codeshare operators.

   We have American Airlines tickets, but it's on British Airways metal.

verb

To make a road using crushed rock, stones etc.

1. Characterized by strong drum-beats and distorted guitars.
2. Having the emotional or social characteristics associated with metal music; brash, bold, frank, unyielding, etc.