noun
extraordinary; excessive; out of the ordinary
Describes something that goes far beyond normal limits, often with a negative or surprising connotation. Commonly used as a noun or na-adjective.
彼の要求は度外れだ。
His demands are excessive.
度外れな値段のワインを注文した。
He ordered a wine at an extraordinary price.
Compound of 度 (degree, limit) and 外れ (deviation, miss). The exact historical derivation is uncertain, but the word literally suggests 'missing the mark' of a normal degree.