Firefighter Glossary A-Z
Operational definitions for fireground tactics, EMS/medical, hazmat/CBRN, and SCBA/apparatus — written for working firefighters, not textbooks.
Glossary Hubs
Fireground Operations
Core tactics, command, suppression, ventilation, search, and water supply terminology used on the fireground.
EMS & Medical
Patient care, assessment, interventions, triage, and EMS system terms commonly used by firefighter/medics.
Hazmat & CBRN
Hazardous materials, decon, isolation zones, UN/ERG concepts, and CBRN terminology.
Apparatus, Gear & SCBA
PPE, SCBA, apparatus components, hose, nozzles, tools, and operational equipment terminology.
About This Glossary
The AllFirefighter Glossary is a searchable reference built for working firefighters, EMS providers, hazmat technicians, and fire service students. Every entry covers the operational definition — what the term means on the job, not just in a textbook — along with usage context, related terms, and links to relevant calculators and tools.
Terms are organized into four hubs: Fireground Operations (ICS, tactics, ventilation, Mayday), EMS/Medical (assessment, airway, cardiac arrest, triage), Hazmat/CBRN (DOT classes, PPE levels, decon, ERG), and Apparatus/Gear/SCBA (engine anatomy, NFPA 1971, air management, nozzles).
Content is written and reviewed against NFPA standards, IFSTA references, and current NIMS/ICS doctrine. This glossary supplements — not replaces — your department SOP/SOG, official training curriculum, and certification standards.