tramline

Meanings

1. The rails that a tram runs on.
2. Either of the two pairs of sidelines marked on a tennis court which mark the outside of the singles and doubles playing areas.
3. A scratch on a film, usually vertical, that extends through multiple frames.
4. A mark or bruise having the shape of two parallel lines.
5. A pair of vertical bars (||) placed to the left of the headword in certain editions of the OED to indicate that the term is "alien or not fully naturalized" (such as a recent borrowing).

1. Of a vehicle: to tend to follow the contours of the ground with its wheels.

Etymology

From tram + line.