black out

CIDE DICTIONARY

black out, v. i. 

 to experience a temporary loss of consciousness, memory, or vision.  [PJC]

black out, v. t. 

•  to cause to become black, such as a stage, a computer screen, or a city.  [PJC]
•  to impose a blackout on (news or a sports event).  [PJC]
•  to make (a written text) illegible by applying a black ink over it; to blot out.  [PJC]
•  to suppress (a memory).  [PJC]

THESAURUS

black out

annul, becloud, bedarken, bedim, begloom, black, blacken, block the light, blot out, brown, cancel, cast a shadow, censor, cloud, cloud over, crap out, darken, darken over, delete, dim, dim out, drop, eclipse, efface, encloud, encompass with shadow, expunge, faint, fall senseless, gloom, gray out, hugger-mugger, hush, hush up, hush-hush, keel over, kill, muffle, murk, obfuscate, obliterate, obnubilate, obscure, obumbrate, occult, occultate, overcast, overcloud, overshadow, pass out, quash, repress, shade, shadow, shush, sit on, smother, somber, squash, squelch, stifle, succumb, suppress, swoon, wipe out