Blocking

Blocking is a process of obstructing passage of something, progress, movement, activity etc. An arrangement in blocks is also called blocking such as of data, shades, or colour. A physical arrangement of actors on stage is also called blocking.

In psychology or psychiatry, blocking is a term for sudden halting of the flow of speech or thought, or failure to recall something unpleasant happened earlier. Sudden halting of speech or thought is considered a symptom of schizophrenia or other mental disorders.