extension(noun) a string of characters beginning with a period and followed by one to three letters; the optional second part of a PC computer filename; "most applications provide extensions for the files they create"; "most BASIC files use the filename extension .BAS"
(noun) a mutually agreed delay in the date set for the completion of a job or payment of a debt; "they applied for an extension of the loan"
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WordNet 2.0 Copyright 2003 by Princeton University. All rights reserved.
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