- The definition of hazardous is something dangerous or risky.
Behavior that could result in you getting hurt is an example of hazardous behavior.
- of or involving chance
- risky; dangerous; perilous
- Marked by danger; perilous.
- Depending on chance; risky.
(comparative more hazardous, superlative most hazardous)
- Risky, dangerous, with the nature of a hazard.
- Exposing to loss or evil.
- Of or involving chance.
From Middle French hasardeux