Meaning
A highway with grade-separated crossings (rather than level crossings) and designed (and only permitted) for high-speed motor-traffic (in Europe motor vehicles with a higher speed limit than 40 km/h) running in two directions on one separate carriageway each.
Etymology
Origin: Unknown
From motor + way.
Synonyms & Antonyms
NYT Puzzle Appearances
Accepted in 4 recorded puzzles, including a pangram: