From Longman Dictionary of Contemporary Englishin forcein forcea) SCLOBEYif a law, rule etc is in force, it already exists The trade embargo has been in force for a year. b) LOT/LARGE NUMBER OR AMOUNTin a large group, especially in order to protest about something SYN in large numbers Villagers turned out in force to protest about the new road. → force
Examples from the Corpus
turned out in force• Abrams's message seemed well received by the crowd, which had turned out in force for the early-morning session.• Ranchers turned out in force to hear him; the crowd was a bobbing sea of black and white cowboy hats.• The stars turned out in force to see Bono and the boys bring a mega tour to a close. 