Definition of "dither"

dither

/ˈdɪðə/

verb
third-person singular simple present dithers, present participle dithering, simple past and past participle dithered
1. To tremble, shake, or shiver with cold.
  Quotations
  Presently he came running out of the scullery, with the soapy water dripping from him, dithering with cold.
  1913, D[avid] H[erbert] Lawrence, “chapter 8”, in Sons and Lovers, London: Duckworth & Co. […]
2. To be uncertain or unable to make a decision about doing something.
  Quotations
  The dithering Mr Singh of recent times may worry that his reform proposals are already too bold. The reforming Mr Singh of yore would see them as just the start.
  2012, The Economist, Sept. 22nd issue, Indian Reform: At Last
3. To do something nervously.
4. (computer graphics) To render an approximation of (an image or graphic) by using dot patterns to simulate the appearance of colors or shades not in the system palette.
5. To intentionally add noise to a signal to randomize errors.
noun
countable and uncountable, plural dithers
1. The state of being undecided.
  Quotations
  Everyone was in a dither; either in it or about to get in it or just climbing out of it. Naturally, the Madam was not in a dither. Dither was a foreign concept to her.
  2002, Thomas P. Glynn, A Child's Christmas In Chicago, page 59
2. A form of noise which is intentionally applied to randomize errors which occur in the processing of both digital audio and digital video data.
3. (computer graphics) The use of dot patterns to approximate colors not available in the palette.