What is the meaning of sustain?

verb

• Lengthen or extend in duration or space.
  • usage: "We sustained the diplomatic negotiations as long as possible"; "prolong the treatment of the patient"; "keep up the good work"
  • synonyms: prolong, keep up
• Undergo (as of injuries and illnesses. )
  • usage: "She suffered a fracture in the accident"; "He had an insulin shock after eating three candy bars"; "She got a bruise on her leg"; "He got his arm broken in the scuffle"
  • synonyms: suffer, have, get
• Provide with nourishment.
  • usage: "We sustained ourselves on bread and water"; "This kind of food is not nourishing for young children"
  • synonyms: nourish, nurture
• 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: keep, maintain
• Be the physical support of; carry the weight of.
  • usage: "The beam holds up the roof"; "He supported me with one hand while I balanced on the beam"; "What's holding that mirror"
  • synonyms: hold, support, hold up
• Admit as valid.
  • usage: "The court sustained the motion"
• Establish or strengthen as with new evidence or facts.
  • usage: "his story confirmed my doubts"; "The evidence supports the defendant"
  • synonyms: confirm, corroborate, substantiate, support, affirm