Noun: impossibility im,pó-su'bi-li-tee
- Incapability of existing or occurring
"The impossibility of faster-than-light travel is a fundamental principle of physics";
- impossibleness
- An alternative that is not available
"Traveling faster than light is an impossibility given our current understanding of physics";
- impossible action
Derived forms: impossibilities
Type of: alternative, choice, nonentity, nonexistence, option
Antonym: possibility
Encyclopedia: Impossibility