Firefighter Glossary: Browse by Category
300+ practical definitions organized by operational domain — Fireground tactics, EMS/Medical, Hazmat/CBRN, and SCBA/Apparatus. Search a term or open a hub below.
360Published terms
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Browse all terms on the Glossary (A–Z). Visit Tools Hub.
Glossary Hubs
Browse terms by operational domain. Each hub links to relevant tools.
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.
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Definitions sorted by most recently added.
facepiece fit factorOperational definition for facepiece fit factor.facepiece strap tensionerOperational definition for facepiece strap tensioner.facepiece lens shroudOperational definition for facepiece lens shroud.Positive Pressure Exhaust VentilationOperational definition for Positive Pressure Exhaust Ventilation.facepiece fit checkOperational definition for facepiece fit check.facepiece panoramic lensOperational definition for facepiece panoramic lens.facepiece lens anti-fog insertOperational definition for facepiece lens anti-fog insert.Capnometry Waveform AnalysisOperational definition for Capnometry Waveform Analysis.