Sentence:  <WSD>Bogus</WSD> stamps are labels made to deceive stamp collectors. Many <WSD>bogus</WSD> stamps were made prior to 1900 when some had names of imaginary countries. 
Meaning of the word marked with <WSD> tags:  Of a totally fictitious issue printed for collectors, often issued on behalf of a non-existent territory or country (not to be confused with forgery, which is an illegitimate copy of a genuine stamp).