enclosure

1

a : the action of extending : state of being extended

b : an enlargement in scope or operation <tools are extensions 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

more:

http://www.merriam-webster.com/dictionary/extension

be careful for what you wish