Backis an adverb, noun, adjective or verb.
Backcan mean ‘returning to an earlier starting point or situation’ or ‘moving to apoint further away’ or ‘replying to something’.Backalso means ‘at the rear of’ or ‘the part of a person or thing that is opposite the front’.
Backas an adverb
Olga’s not looking forward to goingbackto school in September.
[taking a photograph]
Don’t move too farbackor you’ll fall in the swimming pool.
Sorry, I’m just finishing a meeting. Can I ring youbackin ten minutes?
Backas a noun
There’s a new restaurant at thebackof our office building.
Will Hoskins is unlikely to play as he hurt hisbackbadly playing in the Rugby World Cup semi-final and is still receiving treatment.
Backas an adjective
The reporters were chasing her and, in order to avoid the cameras, she had to use thebackdoor of the theatre.
Unfortunately she’s spilt coffee over thebackseat of the car.
Backas a verb
[talking about a pet dog]
He’s got a lovely temperament but he may panic and bite you if youbackhim into a corner.
Did you know that during his driving test hebackedhis car into a bicycle?