|1.||a telephone line serving two or more subscribers|
|2.||the policies or dogma of a political party, to which all members are expected to subscribe|
|3.||chiefly (US) the boundary between adjoining property|
The official policy of an organization or government, as in The current party line opposes legalized abortion in all cases. This term, dating from about 1830, was originally used for a political party's official policy but in the mid-1900s was almost exclusively applied to the rigid dicta of the Soviet Communist Party. Since then it has returned to looser use.