Sentence:  Note that by Western standards this plan <WSD>was</WSD> `` upside down '' , as it put North at the bottom and South at the top , with the other directions correspondingly altered ; but in this respect it was merely following the accepted Chinese convention for all maps . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)