What is the meaning of restrain?

verb

• Keep under control; keep in check.
  • usage: "suppress a smile"; "Keep your temper"; "keep your cool"
  • synonyms: keep, keep back, hold back
• Place limits on (extent or access. )
  • usage: "restrict the use of this parking lot"; "limit the time you can spend with your friends"
  • synonyms: restrict, trammel, limit, bound, confine, throttle
• To close within bounds, limit or hold back from movement.
  • usage: "This holds the local until the express passengers change trains"; "About a dozen animals were held inside the stockade"; "The illegal immigrants were held at a detention center"; "The terrorists held the journalists for ransom"
  • synonyms: confine, hold
• Hold back.
  • synonyms: encumber, cumber, constrain
• To compel or deter by or as if by threats.
  • synonyms: intimidate