"Toxic" means something that is harmful, dangerous, or poisonous. It refers to substances, relationships, behavior, or situations that can cause harm to people or the environment. Full definition
Hundreds of people, from babies to the elderly, have a dangerous level of toxic chemical in their blood stream. (politico.com)
Well for starters, there's a real mix of toxic chemicals in the nail polish. (wellnessmama.com)
This makes it virtually impossible to carry out experiments to determine the long - term effect of toxic substances on a living organism. (sciencedaily.com)