Meaning of air line | Babel Free

Definitions

1. A pipe or tube supplying air or compressed air.
2. A railroad following a very flat, straight route between two endpoints in order to minimize travel times, choosing the shortest, most direct route practical even if longer route that was more advantageous was available.

Equivalents

Examples

“Air-lines from the reservoirs to supply points are 2-in. bore heavy gauge polythene pipes which are carried underground, embedded in sand.”

CEFR level