Edit summary: author unk., date 1894-08-20; source: Seattle Collection, UW Digital, Negative Number: UW5478; descr: Train wreck in University District, Aug. 20, 1894, story on verso. ...
• (n.) Expiration.
Ex'pi·ry noun Expiration. « He had to leave at the expiry of the term.» Lamb. « The Parliament . . . now approaching the expiry of its legal term.» J. Morley. 
Is the expiration date of a derivative. 
Is the expiration date of a derivative.
The last date an option can be traded or exercised.
The last date an option can be traded or exercised....