metalling noun2 •A road surface, especially one of gravel (but sometimes with reference to macadam, tarmacadam, or asphalt concrete).And I did do jobs like collecting acorns which we fed to the pigs, mixed with other things. And I also picked stones off the fields which was done in those times, stones as metalling for the roads. — 1971 •The process or an instance of installing such a surface; paving.[Footnote 32] According to the French map of the Levant, laid in 1925, before the metalling of the roads. — 1964 formsmetallings