Dictionary Entry

event horizon

noun

Find the meaning of the word event horizon, plus dictionary definition, pronunciation, thesaurus-style synonyms, antonyms, and related vocabulary.

Meaning

Dictionary meaning in a clear, student-friendly format.

the boundary around a black hole beyond which neither matter nor light can escape

Example Sentence

Once the star crossed the event horizon, not even light could escape the black hole’s grip.

Usage Note

Use when discussing black holes, space science, or anything that has an irreversible tipping point.

Synonyms

Antonyms