What is the meaning of fill out?

verb

• Write all the required information onto a form.
  • usage: "fill out this questionnaire, please"; "make out a form"
  • synonyms: complete, fill in, make out
• Make bigger or better or more complete.
  • synonyms: round out
• Supplement what is thought to be deficient.
  • usage: "He eked out his meager pay by giving private lessons"; "Braque eked out his collages with charcoal"
  • synonyms: eke out
• Line or stuff with soft material.
  • usage: "pad a bra"
  • synonyms: pad
• Make fat or plump.
  • usage: "We will plump out that poor starving child"
  • synonyms: fatten, fat, flesh out, plump, plump out, fatten out, fatten up
• Become round, plump, or shapely.
  • usage: "The young woman is fleshing out"
  • synonyms: round, flesh out