warm front

1. 1.

   the front of an advancing mass of warmer air

   Broaderfront

Questions about warm front

What does warm front mean?

warm front means "the front of an advancing mass of warmer air".

Is warm front a common word?

warm front is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.