What is the definition or description of: acute schizophrenia?

Acute Schizophrenia: This term refers to an episode or exacerbation of schizophrenia. This disorder is associated with hallucinations and delusions that may worsen or improve over time, as well as difficulty with clear thinking and social relationships. An acute episode would be associated with a significant worsening of delusions and hallucinations.

Confusing term: Im not aware of such a term. Schizophrenia by definition requires symptoms over an extended period of time and is commonly diagnosed in early adulthood. Perhaps the term is a misnomer for acute psychotic episode, which involves prominent psychotic symptoms such as delusions, hallucinations or atypical thought patterns with abrupt onset and short duration.