Front 4 : In meteorology, the boundary between two air masses of differing atmospheric properties including density. A cold front represents the leading edge of colder air replacing warmer air; the reverse of this is a warm front
National Wildfire Coordinating Group (NWCG), Glossary of Wildland Fire Terminology (PMS 205), National Interagency Fire Center, Boise, ID, USA 2012. https://definedterm.com/a/document/10775, (For Fr - Amer) {150}
The Canadian Interagency Forest Fire Centre (CIFFC), Glossary of Forest Fire Management Terms, Manitoba, Canada 2003. http://bcwildfire.ca/mediaroom/Backgrounders/2003_ Fire_Glossary.pdf, (For Fr - Canad) {474}