What is the meaning of confinement?

noun

• Concluding state of pregnancy; from the onset of contractions to the birth of a child.
  • usage: "she was in labor for six hours"
  • synonyms: parturiency, labor, labour, lying-in, travail, childbed
• The act of restraining of a person's liberty by confining them.
• The state of being confined.
  • usage: "he was held in confinement"
• The act of keeping something within specified bounds (by force if necessary. )
  • usage: "the restriction of the infection to a focal area"
  • synonyms: restriction