KID

(CHILD) [noun] [C] [informal] - a child or (esp. US and ANZ) young personI took the kids to the park.The nursery was full of crying kids.He's only 19, just a kid really.(esp. US) Someone's kid sister or brother is their younger sister or brother.(informal) You can call someone, usually someone younger than yourself, 'kid', esp. if you are giving them some advice.Listen, kid, don't try to be funny. [as form of address](disapproving) Kids' stuff/(US usually) kid stuff is something which is too easy and suitable only for children, not adults.She was bored by university lectures, saying it was just kids' stuff.