Definition of black out in English:

black out

(Of a person) undergo a sudden and temporary loss of consciousness: they knocked me around and I blacked out
More example sentences
  • He could feel his consciousness shutting down, blacking out…
  • The sound of the report still echoed in his ears, and with this as his lullaby, he finally lost consciousness and blacked out.
  • The last thing she heard before she blacked out was a sudden increase in noise and panic.
Synonyms
faint, lose consciousness, pass out, swoon
informal go out
See parent entry: black

Definition of black out in:

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Word of the day hubris
Pronunciation: ˈhjuːbrɪs
noun
excessive pride or self-confidence