Sentence:  Once the plane was at cruising altitude I spent the first hour or so just getting used to the surroundings—exploring the stand-up bar Singapore Airlines created at the back of the coach section, ducking into one of the two <WSD>windowed</WSD> rest rooms or longing for the plush seats in business class. 
Meaning of the word marked with <WSD> tags:  Fitted with windows (often of a particular kind).