| 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” |
| noun | act of expanding in scope; making more widely available “extension of the program to all in need” |
| noun | the spreading of something (a belief or practice) into new regions |
| noun | an educational opportunity provided by colleges and universities to people who are not enrolled as regular students |
| noun | act of stretching or straightening out a flexed limb |
| noun | 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” |
| noun | 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” |
| noun | the ability to raise the working leg high in the air “the dancer was praised for her uncanny extension” |
| noun | amount or degree or range to which something extends “the wire has an extension of 50 feet” |
| noun | an additional telephone set that is connected to the same telephone line |
| noun | an addition to the length of something |
| noun | an addition that extends a main building |
| extend | verb | extend in scope or range or area |
| propagate | verb | transmit or cause to broaden or spread |
| referent | adjective | having reference |
| refer | verb | be relevant to |
| denote | verb | have as a meaning |
| extensional | adjective | defining a word by listing the class of entities to which the word correctly applies |
| prolong | verb | lengthen in time; cause to be or last longer |
| elongate | verb | make long or longer by pulling and stretching |
| annex | verb | attach to |