extension

延伸，伸展

延伸部分；增大部分

（电话）分机

extension

延长, 扩充, 范围

扩展名

[逻]外延的, 客观现实的

extension

1. 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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2. act of expanding in scope; making more widely available; "extension of the program to all in need"

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3. the spreading of something (a belief or practice) into new regions

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4. an educational opportunity provided by colleges and universities to people who not enrolled as regular students

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5. act of stretching or straightening out a flexed limb

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6. 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"

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7. 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"

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8. the ability to raise the working leg high in the air; "the dancer was praised for her uncanny extension"; "good extension comes from a combination of training and native ability"

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9. amount or degree or range to which something extends; "the wire has an extension of 50 feet"

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10. an additional telephone set that is connected to the same telephone line

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11. an addition to the length of something

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12. an addition that extends a main building

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