Sentence:  As the guests arrived &mdash; there were about a hundred, a majority in <WSD>period</WSD> attire — I began to feel out of place in my beige summer suit, white shirt, and red necktie. Then I got over it. I certainly didn't suffer from Confederate-uniform envy. 
Meaning of the word marked with <WSD> tags:  Evoking, or appropriate for, a particular historical period, especially through the use of elaborate costumes and scenery.