Definitions

1. adjective

tending to slow down or prevent a process or action; designed to reduce the spread of fire.

“The fire retardant material was used in the furniture to prevent fires from spreading quickly.”

2. noun

a substance or material that is designed to slow down or prevent a process or action, especially the spread of fire.

“The fire department used the retardant to put out the wildfire.”

3. verb

to slow down or prevent a process or action, especially the spread of fire.

“The firefighters worked to retard the fire before it could spread to the nearby buildings.”