What is the meaning of maintain?

verb

• (v.) ()
  • synonyms: keep, hold
• 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, keep up
• Supply with necessities and support.
  • usage: "She alone sustained her family"; "The money will sustain our good cause"; "There's little to earn and many to keep"
  • synonyms: sustain, keep
• State categorically.
  • synonyms: assert, asseverate
• Have and exercise.
  • usage: "wield power and authority"
  • synonyms: wield, exert
• Maintain for use and service.
  • usage: "I keep a car in the countryside"; "She keeps an apartment in Paris for her shopping trips"
  • synonyms: keep
• Maintain by writing regular records.
  • usage: "keep a diary"; "maintain a record"; "keep notes"
  • synonyms: keep
• State or assert.
  • usage: "He maintained his innocence"
  • synonyms: defend
• Support against an opponent.
  • usage: "The appellate court upheld the verdict"
  • synonyms: uphold
• Stick to correctly or closely.
  • usage: "The pianist kept time with the metronome"; "keep count"; "I cannot keep track of all my employees"
  • synonyms: observe, keep