dither

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all of a dither

In a nervous, confused, or agitated state. We were all of a dither waiting to meet the president at our school rally. The interviewer kept asking these really vague questions and got me all of a dither.
See also: all, dither, of

in a dither

In a nervous, confused, or agitated state. We were in a dither waiting to meet the president at our school rally. News that the country's largest corporation has filed for bankruptcy has left the market in a dither. The interviewer kept asking these really vague questions and got me in a dither.
See also: dither
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

in a dither

confused; nervous; bothered. Mary is sort of in a dither lately. Don't get yourself in a dither.
See also: dither
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

in a dither

Also, all of a dither; in a flutter or tizzy . In a state of tremulous agitation, as in Planning the wedding put her in a dither, or He tried to pull himself together, but he was all of a dither, or She showed up in such a flutter that our meeting was useless. The noun dither dates from the early 1800s and goes back to the Middle English verb didderen, "to tremble"; in a flutter dates from the mid-1700s; in a tizzy dates from about 1930 and is of uncertain origin.
See also: dither
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

dither

(ˈdɪðɚ)
n. a state of confusion. (see also in a dither.) He can’t seem to get out of this dither he’s in.

in a dither

mod. confused; undecided. Don’t get yourself in a dither.
See also: dither
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.

in a dither, all

In a jittery, agitated state. This expression dates from the early 1800s, when it also was put as of a dither. The noun dither comes from the Middle English verb didderen, meaning “to tremble.” A newer synonym is in a tizzy, dating from the first half of the 1900s. Its origin is not known.
See also: all
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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References in periodicals archive ?
They show Major as Mr Panic, Mr Weak, Mr Spineless and Mr Dither.
Dither is a random noise added to a signal prior to it (re)quantization in order to control the statistical properties of the quantization error (Wannamaker et al., 2000).
Without dither the output of ideal ADC has quantization error
Positive contribution of dither is lower peak-to-peak value of conditional mean E[[epsilon]|s] compared to error e without dithering.
in (Mariano & Ramos, 2006) the first and the second moment of quatization error were analyzed for sinusoidal input signal without dither. As we prefer evaluation of moments from characteristic function (CF) it is now favorable to write conditional CF of error e resulting from area sampling process
where q is quantization step and [PSI]=2[pi]/q, [[PHI].sub.d] is CF of dither. From CF moments of error E[[[epsilon].sup.m]|s] could be simply found using m-th derivatives of CF in u=0
Assuming symmetrical dither with zero mean the CF [[PHI].sub.d] of dither should be real even function and then
In (Skartlien & 0yehaug, 2005) it was derived that without averaging (N=1) it holds [RMSE.sub.T.sup.2](1)=[[sigma].sub.d.sup.2]+q/12, where [[sigma].sub.d] is standard deviation (STD) of dither, which could be proved by deduction from second derivative of (3).