Definition of "appreciate"

appreciate

/əˈpɹiː.ʃi.eɪt/

verb
third-person singular simple present appreciates, present participle appreciating, simple past and past participle appreciated
1. (transitive) To be grateful or thankful for.
2. (transitive) To view as valuable.
3. (transitive) To be fully conscious of; understand; be aware of; detect.
  Quotations
  to test the power of bees to appreciate colour
  1883, John Lubbock, On the Senses, Instincts and Intelligence of Animals, With Special Reference to Insects
  Eve: You learn to appreciate the light by living in the dark.
  2012, BioWare, Mass Effect 3, Redwood City: Electronic Arts, PC, scene: Normandy SR-2
4. (intransitive, transitive) To increase in value.
  Quotations
  lest a sudden peace should appreciate the money
  1809, David Ramsay, History of South Carolina
  Laughter may be generally classed under three heads,—forced, silly, or vulgar; but hers is the most sweet, real, spirituelle sound possible—it so appreciates the wit, which it increases as it catches—it speaks of spirits so fresh, so youthful!
  1831, L[etitia] E[lizabeth] L[andon], chapter XIX, in Romance and Reality. […], volume I, London: Henry Colburn and Richard Bentley, […], page 234