skiskiskisskiedskiingski-ingnoun (pluralskis)one of a pair of long flat pieces of wood, metal or plastic that you fix to boots so that you can move over snow: a pair of skis▶ skiverb (skis, skiing/, skied/, has skied): Can you ski?We went skiing in Austria.▶ skierskierskiersnoun: Marie's a good skier.