n. Lack of order or regular arrangement; irregularity; indiscriminate distribution; confusion: as, the troops were thrown into disorder; the papers are in disorder.n. Tumult; disturbance of the peace of society; breach of public order or law.n. Neglect of rule; disregard of conventionality.n. Morbid irregularity, disturbance, or interruption of the functions of the animal economy or of the mind; physical or mental derangement; properly, a diseased state of either mind or body that does not wholly disable the faculties; but it is often applied more comprehensively.n. A specific or particular case of disorder; a disease; a derangement, mental or physical: as, gout is a painful disorder.n. Mental perturbation; temporary excitement or discomposure; agitation.n. Synonyms Disarrangement, disorganization, disarray, jumble.n. Commotion, turbulence, riotousness.n. 4 and Illness, ailment, complaint, malady.To destroy or derange the order of; derange; disturb the regular disposition or arrangement of; throw into confusion; disarrange; confuse.To derange the physical or mental health of; bring into a morbid condition of body or mind; indispose.To produce mental disturbance in; unsettle the mind of; perturb; agitate.To derange the natural or regular functions of; throw out of order or balance; unsettle the normal condition of: as, to disorder one's liver; his mind is disordered.To depose from holy orders.n. In logic, disagreement with every conceivable general rule whatever.