Definition of "ultrahazardous" []

• Extremely hazardous; excessively hazardous. (adjective)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "In a letter to the Secret Service, Greenpeace and Friends of the Earth wrote that they were worried that security efforts focused on the Obama entourage "might not extend to the larger community which may suffer serious consequences in case of even one moderately successful terrorist release of ultrahazardous chemicals.""
• "Among the suit's claims for relief are private nuisance, trespass, and ultrahazardous activities."