jack

A small flag, especially one flown at the bow of a ship.

"The Union Jack is the national flag."

To lift something, especially a vehicle, using a jack.

"We need to jack up the car."

A socket or receptacle for an electrical plug or connector.

"Plug your headphones into the audio jack."

A mechanical device used for lifting heavy objects, especially vehicles.

"Use the jack to change the tyre."

A playing card depicting a young man, ranking below a queen.

"He played the jack of hearts."