extension -
n. 1 the act or an instance of extending; the process of being extended.
2 prolongation; enlargement.
3 a part enlarging or added on to a main structure or building.
4 an additional part of anything.
5 a a subsidiary telephone on the same
line as the
main one. b its
number.
6 a an additional period of time, esp. extending allowance for a project etc. b permission for the sale of alcoholic drinks until
later than usual, granted to licensed premises on special occasions.
7 extramural instruction by a university or college (
extension course).
8 extent, range.
9 Logic a group of things denoted by a term.
extensional adj. [ME f. LL extensio (as EXTEND)]
