Meaning of EXTENSION in English

EXTENSION

n.

Pronunciation: ik- ' sten(t)-sh ə n

Function: noun

Etymology: Middle English, from Late Latin extension-, extensio, from Latin extendere

Date: 15th century

1 a : the action of extending : state of being extended b : an enlargement in scope or operation <tools are extension s of human hands>

2 a : the total range over which something extends : COMPASS b : DENOTATION 4

3 a : the stretching of a fractured or dislocated limb so as to restore it to its natural position b : an unbending movement around a joint in a limb (as the knee or elbow) that increases the angle between the bones of the limb at the joint ― compare FLEXION 4a

4 : a property whereby something occupies space

5 : an increase in length of time specifically : an increase in time allowed under agreement or concession

6 : a program that geographically extends the educational resources of an institution by special arrangements (as correspondence courses) to persons otherwise unable to take advantage of such resources

7 a : a part constituting an addition b : a section or line segment forming an additional length c : an extra telephone connected to the principal line d : a length of natural or synthetic hair that is worn attached to one's natural hair e : a series of usually three or four characters following a dot at the end of the name of a computer file that specifies the file's format or purpose

8 : a mathematical set (as a field or group) that includes a given and similar set as a subset

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.