Sentence:  Standing in the shelter of the tent - a rejected hospital <WSD>tent</WSD> on which the rain now dripped , no longer drumming - Adam watched his own hands touch the objects on the improvised counter of boards laid across two beef barrels . 
Meaning of the word marked with <WSD> tags:  a portable shelter (usually of canvas stretched over supporting poles and fastened to the ground with ropes and pegs)