Meaning

1. line, a string, a thread
2. line, a straight path through two or more points
3. line, a thin wrinkle or crease in skin, fabric, &c.
4. line, a straight marking of longitude or latitude
5. line, a queue or sequence of people or objects
6. line, a row of text
7. product line, a series of related products
8. telephone line, a physical telephone connection or a single telephony account
9. fishing line, a line used to catch or hang fish
10. railroad track, whether straight or not
11. line, a railroad or other mass transportation route
12. linha, Portuguese line, a former small unit of length about equal to 2.3 mm