COSMONAUT - Definition & Meaning for Kids

Simple definitions and word synonyms for kids.

Part of speech: Noun

a person trained to travel in a spacecraft

Example: the Russians called their astronauts cosmonauts

The word "cosmonaut" comes from Ancient Greek κόσμος, which was borrowed from Russian космона́вт.

cosmos – A related word in the same word family.

naut – A related word in the same word family.

Greek mythology embedded itself so deeply in language that we still use mythological names as common words.