Sentence:  The <WSD>contemporanea expositio</WSD> is a safe key to the meaning of deeds, and in Evelyn&#39;s Memoirs, written fourteen years after the complete establishment of the Charter House, we have a striking illustration of the original rule as he understood it ... 
Meaning of the word marked with <WSD> tags:  The doctrine that the legal opinions of the time a document was written should be used to interpret laws in preference to more modern formulations.