- an act or instance of extending, lengthening, stretching out, or enlarging the scope of something.
- the state of being extended, lengthened, or stretched out.
- that by which something is extended or enlarged; an addition: a four-room extension to a house.
- an additional period of time given one to meet an obligation: My term paper wasn't finished so I asked for an extension.
- something that is expandable or can be extended; an extended object: a table with drop-leaf extensions.
- range or scope of extending; degree of extensiveness; extent: the extension of our knowledge.
- an additional telephone that operates on the principal line.
- Commerce. a written engagement on the part of a creditor, allowing a debtor further time to pay a debt.
- Physics. that property of a body by which it occupies space.
- the act of straightening a limb.
- the position that a limb assumes when it is straightened.
- Surgery. the act of pulling the broken or dislocated part of a limb in a direction from the trunk, in order to bring the ends of the bone into their natural situation.
- Also called extent. Logic. the class of things to which a term is applicable, as “the class of such beings as Plato and Alexander” to which the term “man” is applicable.Compare intension(def 5).
- Mathematics. a function having a domain that includes the domain of a given function and that has the same value as the given function at each point in the domain of the given function.
- Also called file extension. Computers. one or more characters at the end of a filename, usually following a period, used to indicate the type of file.
- Manège. the act of bringing or coming into an extended attitude.
- of or relating to extension courses.
Origin of extension
SynonymsSee more synonyms for extension on Thesaurus.com
- the act of extending or the condition of being extended
- something that can be extended or that extends another object
- the length, range, etc, over which something is extended; extent
- an additional telephone set connected to the same telephone line as another set or other sets
- a room or rooms added to an existing building
- a delay, esp one agreed by all parties, in the date originally set for payment of a debt or completion of a contract
- the property of matter by which it occupies space; size
- the act of straightening or extending an arm or leg
- its position after being straightened or extended
- med a steady pull applied to a fractured or dislocated arm or leg to restore it to its normal positionSee also traction (def. 3)
- a service by which some of the facilities of an educational establishment, library, etc, are offered to outsiders
- (as modifier)a university extension course
- the class of entities to which a given word correctly applies: thus, the extension of satellite of Mars is the set containing only Deimos and PhobosCompare intension (def. 1a)
- conservative extensiona formal theory that includes among its theorems all the theorems of a given theory
Word Origin and History for extensionally
c.1400, from Old French extension (14c.) and directly from Latin extensionem/extentionem (nominative extensio/extentio), noun of action from past participle stem of extendere (see extend). In a concrete sense, "extended portion of something" (a railroad, etc.), from 1852. Telephone sense is from 1906.
- The act of straightening or extending a flexed limb.
- A pulling or dragging force exerted on a limb in a distal direction.
- Mathematics A set that includes a given and similar set as a subset.
- Computer Science A set of characters that follow a filename and are separated from it by a period, used to identify the kind of file.