3. The course followed by anything in motion; hence, a road or route; as, the arrow descended in a curved line; the place is remote from lines of travel.
4. Direction; as, the line sight or vision.
5. A row of letters, words, etc., written or printed; esp., a row of words extending across a page or column.
6. A short letter; a note; as, a line from a friend.
7. (Poet.)
Defn: A verse, or the words which form a certain number of feet, according to the measure. In the preceding line Ulysses speaks of Nausicaa. Broome.
8. Course of conduct, thought, occupation, or policy; method of argument; department of industry, trade, or intellectual activity. He is uncommonly powerful in his own line, but it is not the line of a first-rate man. Coleridge.
9. (Math.)
Defn: That which has length, but not breadth or thickness.
10. The exterior limit of a figure, plat, or territory; boundary; contour; outline. Eden stretched her line From Auran eastward to the royal towers Of great Seleucia. Milton.