Noun

(en noun)

The act of disturbing, being disturbed.

Something that disturbs.

That guy causes a lot of trouble, you know, he's such a disturbance .

An interruption of that which is normal or regular.

* {{quote-magazine, date=2012-01

, author=Donald Worster , title=A Drier and Hotter Future , volume=100, issue=1, page=70 , magazine= citation , passage=Phoenix and Lubbock are both caught in severe drought, and it is going to get much worse. We may see many such [dust] storms in the decades ahead, along with species extinctions, radical disturbance of ecosystems, and intensified social conflict over land and water. Welcome to the Anthropocene, the epoch when humans have become a major geological and climatic force.}}

(psychology) A serious mental imbalance or illness.

Noun

(en-noun)

A temporary mental state with a sudden onset, usually reversible, including symptoms of confusion, inability to concentrate, disorientation, anxiety, and sometimes hallucinations. Causes can include dehydration, drug intoxication, and severe infection.

* Washington Irving

The popular delirium [of the French Revolution] at first caught his enthusiastic mind.

* Motley

the delirium of the preceding session (of Parliament)