Beyondis a preposition or an adverb.
Beyondreferring to place
Beyondas a prepositionmeans ‘further away in thedistance (than something)’:
Beyondthe door was a narrow corridor that led off to the right.
He could see the horse in the field, justbeyondthe hedge.
As an adverb,beyondis less common and is rather formal:
The balcony provided a magnificent view of the river and the mountainsbeyond.
Beyondmeaning ‘outside the limits’
We usebeyondwith expressions of time to mean ‘after that time’ or ‘further than that time’:
It’s impossible to predictbeyond the next five yearsas regards world economic trends.(we cannot predict further in time than the next five years)
Beyondvery often has a meaning of ‘outside the limits of something’. We often use it in the expressionsbeyond beliefandbeyond doubt:
That the government should want to tax the poor even more heavily isbeyond belief.(no one can believe it)
Her commitment to her profession isbeyond doubt.(no one can doubt it)
The mechanic announced that the engine wasbeyond repair.(it could not be repaired)