used before the second or further of two or more alternatives (the first being introduced by a negative such as ‘neither’ or ‘not’) to indicate that they are each untrue or each do not happen

they were neither cheap nor convenient

the sheets were never washed, nor the towels, nor his shirts

used to introduce a further negative statement

‘I don't see how.’ ‘Nor do I.’

the struggle did not end, nor was it any less diminished

than

she thinks she knows better nor me

nor God nor demon can undo the done

a Boolean operator which gives the value one if and only if all operands have a value of zero and otherwise has a value of zero