Definition of "portraiture"

portraiture

/ˈpɔː(ɹ)tɹɪtjʊə(ɹ)/

noun
countable and uncountable, plural portraitures
1. A portrait; a likeness; a painted resemblance; hence, that which is copied from some example or model.
  Quotations
  For, by the image of my cause, I see / The portraiture of his.
  c. 1599–1602 (date written), William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene ii]
2. The art of painting or photographing portraits.
3. A portrait (or portraits considered as a group).