Taciturn or Taciturnity may refer to:

  • HMS Taciturn (P334), a British submarine of the third group of the T class
  • Silence
  • Abandonment (legal) (known as taciturnity in Scots law), failure to assert a legal right in a way that implies abandonment of the right
  • William the Silent (also known as William the Taciturn), leader of the Dutch revolt against the Spanish Habsburgs that set off the Eighty Years' War