mental blank

Definitions

A temporary inability to remember something or to think clearly.

A sudden, momentary lapse in concentration or memory.

Examples

I had a complete mental blank during the exam and couldn't remember the answer to the first question.

She stared at the screen with a mental blank, unable to recall the password she had used just yesterday.

Synonyms

brain fog memory lapse temporary amnesia mind going blank cognitive block

Antonyms

total recall perfect clarity sharp focus vivid recollection mental alertness