Pronunciation: (mān'tu-nuns),[key] —n. 1. the act of maintaining.
2. the state of being maintained: the maintenance of friendly relations with England. 3. care or upkeep, as of machinery or property: With proper maintenance the car will last for many years. 4. means of upkeep, support, or subsistence; livelihood: to provide a comfortable maintenance. 5. alimony or child support.
6. Law.an officious meddling in a suit in which the meddler has no interest, by assisting either party with means to prosecute or defend it.
—adj. Pharm.,Psychiatry.administered to sustain a desired physiological or mental condition: maintenance dose.