Sentence:  He halfheartedly paid attention to the flurry of activity on the <WSD>runway</WSD>, until a thunderous round of applause suddenly broke out. He then sat up straight, giving his full attention to the striking, attention-grabbing model who'd just strolled onto the <WSD>runway</WSD>. 
Meaning of the word marked with <WSD> tags:  A narrow walkway (often on a platform) extending from a stage on which people walk, especially one used by models during fashion shows.