dither (Noun) — An excited state of agitation. ex. "he was in a dither"
dither (Verb) — Act nervously; be undecided; be uncertain.
dither (Verb) — Make a fuss; be agitated.
dither (Verb) — (computing) to smooth jagged edges of a curve by placing shaded pixels between the pixels that make up the curve, usually done by graphics programs.
dither (Verb) — (computing) to create a new colour by displaying a fine pattern of coloured pixels that appears to the eye as a new colour; for example, a pattern of black and white pixels equally spaced would appear as grey.