| conservation | |
| 1. n. The act of preserving, guarding, or protecting; the keeping (of a thing) in a safe or entire state; preservation. | |
| 2. n. Wise use of natural resources. | |
| 3. n. (biology) The discipline concerned with protection of biodiversity, the environment, and natural resources | |
| 4. n. (biology) Genes and associated characteristics of biological organisms that are unchanged by evolution, for example similar or identical nucleic acid sequences or proteins in different species descend | |
| 5. n. (culture) The protection and care of cultural heritage, including artwork and architecture, as well as historical and archaeological artifacts | |
| 6. n. (physics) lack of change in a measurable property of an isolated physical system (conservation of energy, mass, momentum, electric charge, subatomic particles, and fundamental symmetries) | |
