1. easily set on fire; capable of burning quickly

Examples

• Gasoline is highly flammable and should be stored safely.
• The warehouse contained flammable materials like paper and cardboard.
• Please keep flammable liquids away from heat sources.
• The fabric was treated to make it less flammable.
• Warning signs indicated that flammable chemicals were stored inside.
• Dry leaves become very flammable during hot summer months.