Big One (English, noun)
expansion: Big One
Senses:
topics: geography
geology
natural-sciences
seismology
glosses: A hypothetical massive earthquake somewhere along the Pacific coast of North America, but especially one projected to cause catastrophic damage to a major city such as Vancouver, Seattle, San Francisco, or Los Angeles.
tags: colloquial
usually
raw_tags: with the
glosses: Any other hypothetical event with the potential to be far more devastating than previous events of the same type.
tags: broadly
colloquial
Forms: