kilo//ˈkiːloʊ//A2Frequency Level 12ColloquialNounkiloSingularkilosPlural1A kilogram, a unit of mass equal to 1,000 grams.I bought two kilos of apples at the market.2A kilometer, a unit of distance equal to 1,000 meters.The school is about two kilos from my house.Synonymkilogramkg