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say it: ik-STEN-shuhn
extension is a noun meaning "a mutually agreed delay in the date set for the completion of a job or payment of a debt". It carries 12 recorded senses.
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”
the spreading of something (a belief or practice) into new regions
an educational opportunity provided by colleges and universities to people who are not enrolled as regular students
act of stretching or straightening out a flexed limb
a string of characters beginning with a period and followed by one or more 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”
the most direct or specific meaning of a word or expression; the class of objects that an expression refers to
“the extension of `satellite of Mars' is the set containing only Demos and Phobos”
amount or degree or range to which something extends
“the wire has an extension of 50 feet”
an additional telephone set that is connected to the same telephone line
an addition to the length of something
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for extension come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.