[f. COAL v. + -ER.]
1. One employed in coaling steam-vessels.
1879. Boddam-Whetham, Roraima, 31. They are coalers returning from their hard days labour in the harbour.
2. A tender to a steam-ship.
1870. Daily News, 10 Oct., 4/6. A turret-ship which should find itself cut off from its coaler, and compelled to give battle, would be in a most perilous position.