What is the meaning of call for?

verb

• Express the need or desire for; ask for.
  • usage: "She requested an extra bed in her room"; "She called for room service"
  • synonyms: request, bespeak, quest
• Require as useful, just, or proper.
  • usage: "It takes nerve to do what she did"; "success usually requires hard work"; "This job asks a lot of patience and skill"; "This position demands a lot of personal sacrifice"; "This dinner calls for a spectacular dessert"; "This intervention does not postulate a patient's consent"
  • synonyms: necessitate, ask, postulate, need, require, take, involve, demand
• Request the participation or presence of.
  • usage: "The organizers invite submissions of papers for the conference"
  • synonyms: invite
• Gather or collect.
  • usage: "You can get the results on Monday"; "She picked up the children at the day care center"; "They pick up our trash twice a week"
  • synonyms: collect, pick up, gather up