EXTENSION

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does extension mean? 

• EXTENSION (noun)
  The noun EXTENSION has 12 senses:

1. a mutually agreed delay in the date set for the completion of a job or payment of a debt

2. act of expanding in scope; making more widely available

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

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

5. act of stretching or straightening out a flexed limb

6. a string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename

7. the most direct or specific meaning of a word or expression; the class of objects that an expression refers to

8. the ability to raise the working leg high in the air

9. amount or degree or range to which something extends

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

11. an addition to the length of something

12. an addition that extends a main building

  Familiarity information: EXTENSION used as a noun is familiar.

 Dictionary entry details 

• EXTENSION (noun)

Sense 1

Meaning:

A mutually agreed delay in the date set for the completion of a job or payment of a debt

Classified under:

Nouns denoting time and temporal relations

Context example:

they applied for an extension of the loan

Hypernyms ("extension" is a kind of...):

delay; hold; postponement; time lag; wait (time during which some action is awaited)

Sense 2

Meaning:

Act of expanding in scope; making more widely available

Classified under:

Nouns denoting acts or actions

Context example:

extension of the program to all in need

Hypernyms ("extension" is a kind of...):

enlargement; expansion (the act of increasing (something) in size or volume or quantity or scope)

Hyponyms (each of the following is a kind of "extension"):

spread; spreading (act of extending over a wider scope or expanse of space or time)

stretch (extension to or beyond the ordinary limit)

Derivation:

extend (extend in scope or range or area)

Sense 3

Meaning:

The spreading of something (a belief or practice) into new regions

Classified under:

Nouns denoting communicative processes and contents

Synonyms:

extension; propagation

Hypernyms ("extension" is a kind of...):

airing; dissemination; public exposure; spreading (the opening of a subject to widespread discussion and debate)

Sense 4

Meaning:

An educational opportunity provided by colleges and universities to people who are not enrolled as regular students

Classified under:

Nouns denoting acts or actions

Synonyms:

extension; extension service; university extension

Hypernyms ("extension" is a kind of...):

didactics; education; educational activity; instruction; pedagogy; teaching (the activities of educating or instructing; activities that impart knowledge or skill)

Meronyms (parts of "extension"):

extension course (a course offered as part of an extension service)

Sense 5

Meaning:

Act of stretching or straightening out a flexed limb

Classified under:

Nouns denoting acts or actions

Hypernyms ("extension" is a kind of...):

stretching (act of expanding by lengthening or widening)

Hyponyms (each of the following is a kind of "extension"):

hyperextension (greater than normal extension)

Antonym:

flexion (act of bending a joint; especially a joint between the bones of a limb so that the angle between them is decreased)

Derivation:

extend (extend one's limbs or muscles, or the entire body)

Sense 6

Meaning:

A string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename

Classified under:

Nouns denoting communicative processes and contents

Synonyms:

extension; file name extension; filename extension

Context example:

most BASIC files use the filename extension .BAS

Hypernyms ("extension" is a kind of...):

string (a linear sequence (as of characters, words, proteins, etc.))

Holonyms ("extension" is a part of...):

computer file name; computer filename; file name; filename ((computer science) the name given to a computer file in order to distinguish it from other files; may contain an extension that indicates the type of file)

Sense 7

Meaning:

The most direct or specific meaning of a word or expression; the class of objects that an expression refers to

Classified under:

Nouns denoting cognitive processes and contents

Synonyms:

denotation; extension; reference

Context example:

the extension of 'satellite of Mars' is the set containing only Demos and Phobos

Hypernyms ("extension" is a kind of...):

meaning; substance (the idea that is intended)

Derivation:

extensional (defining a word by listing the class of entities to which the word correctly applies)

Sense 8

Meaning:

The ability to raise the working leg high in the air

Classified under:

Nouns denoting attributes of people and objects

Context example:

good extension comes from a combination of training and native ability

Hypernyms ("extension" is a kind of...):

property (a basic or essential attribute shared by all members of a class)

dance (an artistic form of nonverbal communication)

Sense 9

Meaning:

Amount or degree or range to which something extends

Classified under:

Nouns denoting attributes of people and objects

Synonyms:

extension; lengthiness; prolongation

Context example:

the wire has an extension of 50 feet

Hypernyms ("extension" is a kind of...):

longness (the property of being of long spatial extent)

Hyponyms (each of the following is a kind of "extension"):

coextension (equality of extension or duration)

Sense 10

Meaning:

An additional telephone set that is connected to the same telephone line

Classified under:

Nouns denoting man-made objects

Synonyms:

extension; extension phone; telephone extension

Hypernyms ("extension" is a kind of...):

phone; telephone; telephone set (electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds)

Sense 11

Meaning:

An addition to the length of something

Classified under:

Nouns denoting man-made objects

Synonyms:

elongation; extension

Hypernyms ("extension" is a kind of...):

add-on; addition; improver (a component that is added to something to improve it)

Sense 12

Meaning:

An addition that extends a main building

Classified under:

Nouns denoting man-made objects

Synonyms:

annex; annexe; extension; wing

Hypernyms ("extension" is a kind of...):

add-on; addition; improver (a component that is added to something to improve it)

Hyponyms (each of the following is a kind of "extension"):

ell (an extension at the end and at right angles to the main building)

Holonyms ("extension" is a part of...):

building; edifice (a structure that has a roof and walls and stands more or less permanently in one place)

 Context examples 

Colorectal cancer in situ involving the lamina propria (intramucosal) without extension through the muscularis mucosa into the submucosa.

(Colorectal Cancer pTis Lamina Propria Invasion TNM Finding, NCI Thesaurus)

An extension to a shaft designed to impart a rotational energy to the shaft.

(Crank Arm Assembly Device Component, NCI Thesaurus)

The measurement of physical and /or chemical characteristics of cells, or, by extension, of other biological particles.

(Cytometry, NCI Thesaurus)

Colorectal cancer with invasion through the muscularis propria into the submucosa, or into non-peritonealized pericolic or perirectal soft tissues, with tumor extension of more than 5 mm beyond the border of the muscularis propria.

(Colorectal Cancer pT3 c/d TNM Finding, NCI Thesaurus)

Colorectal cancer with invasion through the muscularis propria into the submucosa, or into non-peritonealized pericolic or perirectal soft tissues, with tumor extension of 5 mm or less beyond the border of the muscularis propria.

(Colorectal Cancer pT3 a/b TNM Finding, NCI Thesaurus)

This group is comprised of both short and long filament polypeptides that are primarily involved in movement and muscle contraction and extension.

(Muscle Protein, NCI Thesaurus)

Exhibiting or pertaining to microinvasion, the microscopic extension of malignant cells into adjacent tissue in carcinoma in situ.

(Microinvasive, NCI Thesaurus)

Catherine was delighted with this extension of her Bath acquaintance, and almost forgot Mr. Tilney while she talked to Miss Thorpe.

(Northanger Abbey, by Jane Austen)

A long, branching outgrowth or extension from a neuron, that carries electrical signals from synapses to the cell body; any structure that resembles a dendrite.

(Dendrite, NCI Thesaurus)

A series of nerves within the pelvis formed mostly by the extension of the hypogastric plexus and branches from the second, third and fourth sacral nerves.

(Inferior Hypogastric Nerve Plexus, NCI Thesaurus)