Sentence:  We expressed our readiness, and in ten minutes were in the station wagon, rolling rapidly down the long drive, for it was then after nine....As we reached the lodge we heard the whistle, and we backed up against one side of the <WSD>platform</WSD> as the train pulled up at the other. 
Meaning of the word marked with <WSD> tags:  A raised structure from which passengers can enter or leave a train, metro etc.