キロ

きろ
noun
kilo; kilometer; kilogram
1. kilometer
A unit of distance equal to 1000 meters.
It's two kilometers to the station.
時速(じそく)(ひゃく)キロ(はし)
To drive at 100 kilometers per hour.
It's ten kilometers from my house to the office.
2. kilogram
A unit of weight equal to 1000 grams.
(さん)キロ(ふと)った
I gained three kilos.
This luggage weighs five kilos.
The baby weighed three kilos.

キロ is an abbreviation for both キロメートル (kilometer) and キログラム (kilogram). Context determines which.

FULL FORMS:

  • キロメートル: kilometer (km) - distance
  • キログラム: kilogram (kg) - weight
  • キロカロリー: kilocalorie (kcal) - energy

CONTEXT CLUES:

  • With distance/speed: キロ = kilometer
  • With weight/body: キロ = kilogram

COMMON EXPRESSIONS:

  • [number]キロ(さき): [number] kilometers ahead
  • 時速(じそく)[number]キロ: [number] km/h
  • [number]キロ()せた/(ふと)った: lost/gained [number] kg

NOTE:
Japan uses the metric system for distance and weight.