What is the meaning of conserving?

verb

• Keep constant through physical or chemical reactions or evolutionary change.
  • usage: "Energy is conserved in this process"
  • synonyms: conserve
• Keep in safety and protect from harm, decay, loss, or destruction.
  • usage: "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"
  • synonyms: conserve, preserve, maintain, keep up
• Use cautiously and frugally.
  • usage: "I try to economize my spare time"; "conserve your energy for the ascent to the summit"
  • synonyms: conserve, husband, economize, economise
• Preserve with sugar.
  • usage: "Mom always conserved the strawberries we grew in the backyard"
  • synonyms: conserve