What is the meaning of signing?

noun

• Language expressed by visible hand gestures.
  • synonyms: sign language

verb

• Mark with one's signature; write one's name (on. )
  • usage: "She signed the letter and sent it off"; "Please sign here"
  • synonyms: sign, subscribe
• Approve and express assent, responsibility, or obligation.
  • usage: "All parties ratified the peace treaty"; "Have you signed your contract yet"
  • synonyms: sign, ratify
• Be engaged by a written agreement.
  • usage: "He signed to play the casino on Dec. 18"; "The soprano signed to sing the new opera"
  • synonyms: sign
• Engage by written agreement.
  • usage: "They signed two new pitchers for the next season"
  • synonyms: sign, contract, sign on, sign up
• Communicate silently and non-verbally by signals or signs.
  • usage: "He signed his disapproval with a dismissive hand gesture"; "The diner signaled the waiters to bring the menu"
  • synonyms: sign, signal, signalize, signalise
• Place signs, as along a road.
  • usage: "sign an intersection"; "This road has been signed"
  • synonyms: sign
• Communicate in sign language.
  • usage: "I don't know how to sign, so I could not communicate with my deaf cousin"
  • synonyms: sign
• Make the sign of the cross over someone in order to call on God for protection; consecrate.
  • synonyms: bless, sign