Definition of maintenance - the process of preserving a condition or situation or the state of being preserved, the provision of financial support for a perso. Medical Definition of maintenance. : designed or adequate to maintain a patient in a stable condition : serving to maintain a gradual process of healing or to prevent a relapse a maintenance dose maintenance chemotherapy. Maintenance is an expense that, unlike capital improvement (which extends an asset's life), is not capitalized. 3. Engineering: Actions necessary for retaining or restoring a piece of equipment, machine, or system to the specified operable condition to achieve its maximum useful life. a maintaining or being maintained; upkeep, support, defense, etc.; specif., the work of keeping a building, machinery, etc. in a state of good repair. 2. means of support or sustenance; livelihood. a job that barely provides a maintenance. maintenance definition: 1. the work needed to keep a road, building, machine, etc. in good condition: 2. money that a person must pay regularly by law in order . Define maintenance. maintenance synonyms, maintenance pronunciation, maintenance translation, English dictionary definition of maintenance. n. 1. The act of . Definition of Maintenance: The work of keeping something in proper condition, care or upkeep including: taking steps to avoid something breaking down . Maintenance definition, the act of maintaining: the maintenance of proper oral hygiene. See more. The legal definition of Maintenance is The obligation of one person to contribute, in part or in whole, to the cost of living of another person. ลองค้นหาคำในรูปแบบอื่นๆ เพื่อให้ได้ผลลัพธ์มากขึ้นหรือน้อยลง: -maintenance-, Thai definition: การเอาใจใส่ดูแลเลี้ยงดู เช่น การทะนุบำรุงบิดามารดา การทะนุบำรุงบุตรธิดา, .