Learn how to say Back Down correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word back:
1the rear surface of the human body from the shoulders to the hips:
he lay on his back
the upper surface of an animal’s body that corresponds to a person’s back:
the adults have white bodies with grey backs
the spine of a person or animal.
the main structure of a ship’s hull or an aircraft’s fuselage:
Demetrius broke its back on the rocks in a force 11 gale
the part of a garment that covers a person’s back:
a top with a scooped neckline and a low back
a person’s back regarded as carrying a load or bearing an imposition:
the Press are on my back
2the side or part of something that is away from the spectator or from the direction in which it moves or faces; the rear:
at the back of the hotel is a secluded garden
a rubber dinghy with an engine at the back
the position directly behind someone or something:
she unbuttoned her dress from the back
the side or part of an object that is not normally seen or used:
write on the back of a postcard
the part of a chair against which the sitter’s back rests.
3a player in a team game who plays in a defensive position behind the forwards:
their backs showed some impressive running and passing
4 (the Backs) the grounds of Cambridge colleges which back on to the River Cam.: