preserve with sugar; "Mom always conserved the strawberries we grew in the backyard"
use cautiously and frugally; "I try to economize my spare time"; "conserve your energy for the ascent to the summit"
keep in safety and protect from harm, decay, loss, or destruction; "We preserve these archeological findings"; "The old lady could not keep up the building"; "children must be taught to conserve our national heritage"; "The museum curator conserved the ancient manuscripts"
keep constant through physical or chemical reactions or evolutionary change; "Energy is conserved in this process"
(New Testament) in Revelations it is foretold that those faithful to Jesus will reign with Jesus over the earth for a thousand years; the meaning of these words have been much debated; some denominations (e.g. Jehovah's Witnesses) expect it to be a thousand years of justice and peace and happiness