Sentence:  Prohibition was the law of the land , but it was unpopular ( how many of us oldsters took up drinking in <WSD>prohibition</WSD> days , drinking was so gay , so fashionable , especially in the sophisticated Northeast ! ) 
Meaning of the word marked with <WSD> tags:  the period from 1920 to 1933 when the sale of alcoholic beverages was prohibited in the United States by a constitutional amendment