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RETURN

A1to or in the place where someone or something was before

• I'll be back in five minutes.
• Put the book back on the shelf.

AS BEFORE

A2returning to an earlier state or condition

• Go back to sleep.
• Things are getting back to normal.

IN REPLY

A2in reply, or in return

• Can you call me back later?
• She smiled back at me.

BEHIND

B1in a direction behind you

• He looked back and waved.
• Step back from the edge.

EARLIER

B1in or into the past

• Back in 2010, I was still at school.
• Think back to your first day at work.

BODY

A1the part of your body from your shoulders to your bottom

• I've got a pain in my back.
• She was lying on her back.

REAR PART

A2the part of something that is furthest from the front

• We sat at the back of the bus.
• Write your name on the back of the photo.

CHAIR

B2the part of a chair that you lean against

• He hung his coat over the back of the chair.

A2at or near the part of something that is furthest from the front

• Leave by the back door.
• The back seat of the car was full of bags.

SUPPORT

B2to give support to someone or something

• Most people backed the plan.
• The bank refused to back the project.

MOVE BACKWARDS

B2to move backwards, or to make a vehicle move backwards

• She backed the car into the garage.