extension
noun
ex·ten·sion
ik-ˈsten(t)-shən
1
2
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 (such as the knee or elbow) that increases the angle between the bones of the limb at the joint compare flexion sense 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 (such 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 (such as a field or group) that includes a given and similar set as a subset
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Merriam-Webster unabridged
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