1. the quality or degree of being poisonous or harmful to living organisms
2. the quality of being very harmful or unpleasant in a non-physical way

Examples

• Scientists tested the toxicity of the new chemical compound.
• The toxicity of lead paint makes it dangerous for children.
• High levels of toxicity were found in the contaminated water supply.
• The toxicity of their relationship was affecting everyone around them.
• Online toxicity has become a serious problem on social media platforms.
• The doctor explained the toxicity levels of different medications.
• Environmental toxicity from industrial waste threatens local wildlife.