Dangerous: meaning, definitions and examples

Use this term when referring to situations, objects, or activities that can cause harm or injury. It is a general term and can be applied in many contexts.

• Walking alone at night in an unfamiliar area is dangerous
• Handling toxic chemicals without proper protection is dangerous

Typically used in formal or technical contexts to describe materials, substances, or conditions that pose a significant risk to health or safety.

• Disposing of hazardous waste requires special procedures
• Working in a chemical plant can be hazardous if safety protocols are not followed

Use this term to refer to actions or decisions that involve a high level of uncertainty and potential for negative outcomes. It is often used in casual or everyday contexts.

• Investing all your savings in a new business can be risky
• It’s risky to drive without wearing a seatbelt

This word is often used to describe situations that involve a high level of risk or danger, often with a dramatic or literary tone.

• Climbing the mountain during a storm was a perilous undertaking
• They embarked on a perilous journey across the desert

Used to describe something or someone that can cause harm or injury.

• That road is dangerous during winter because it's very icy.
• It's dangerous to walk alone in that part of the city at night.

Used to describe situations, places, or activities that are not secure and pose a risk of harm or danger.

• The bridge is unsafe for vehicles due to structural damage.
• He felt unsafe walking through the dark alley.

Typically describes something that can cause damage or negative effects, especially to health or well-being.

• Smoking is harmful to your lungs.
• Many household cleaning products can be harmful if ingested.

Used to describe someone or something that poses an imminent danger or suggests harm or hostility.

• The storm clouds look very threatening.
• She received a threatening letter in the mail.