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firecracker a small paper tube filled with gunpowder, which explodes and makes a loud noise when its fuse is lit. Firecrackers are sometimes used during celebrations.
fire department a part of a city or town government that works to prevent and put out fires, or the people who work for it.
fire engine a large truck that carries firefighters and their tools to a fire. Fire engines usually have a ladder and a pump for spraying water or chemicals used to put out fires.
fire escape a metal stair or ladder used as an emergency exit in case of fire. Fire escapes are usually on the outside of buildings.
fire extinguisher a container for chemicals that can be sprayed on a fire to put it out.
firefighter someone who fights fires, either for pay or as a volunteer.
firefly an insect whose lower body flashes with light at night. A firefly is a kind of beetle.
firehouse a building in which equipment for fighting fires is kept and where firefighters meet; fire station.
fireman a male firefighter.
fireplace a brick or stone space in a room for making fires. A fireplace has a chimney, which keeps smoke from building up inside the room.
fireproof difficult or impossible to set on fire or to damage or destroy with fire.
fireside the area near a fireplace.
fire station a place where firefighters stay and where fire trucks and things to fight fires are kept.
firewood wood that is burned for cooking or heating.
fireworks devices that burn or explode to make noise, bright lights, or brilliant colors. [2 definitions]
firm1 hard or solid when pressed; not soft. [2 definitions]
firm2 a business started by two or more people.
first before all others in time, importance, or quality. [5 definitions]
first aid emergency medical help given to a hurt or sick person while waiting for a doctor.
first baseman in baseball, the player whose position is at first base while the other team is batting and whose primary function is to defend that base.
first-class of the highest in quality; best. [2 definitions]