noun
Usage: often capitalized P&F
: a working coalition of leftist and sometimes middle-of-the-road political parties against a common opponent (as fascism) ; specifically : one sponsored and dominated by Communists as a device for gaining power
ally Laborites with Communists in a Popular Front — Time
official opposition to a Popular Front — Manchester Guardian Weekly
Chile was ruled by a popular front government — W.L.Schurz