What does キロ mean?
キロ is a Japanese prefix meaning “kilo-; 1000” in English. It can also be translated as “kilogram, kilometre” depending on context. It is written as キロ in hiragana, and kiro in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
この車は時速６０キロで走っている。
This car is going 60km an hour.