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1. (n.) indicator
a person or thing that indicates.
2. indicator
a pointing or directing device, as a pointer on the dial of a measuring instrument.
3. indicator
an instrument that indicates the condition of a machine in operation.
4. indicator
a substance, as litmus, that indicates the presence or concentration of a certain constituent.
5. indicator
a substance often used in a titration to indicate the point at which the reaction is complete.
6. indicator
a plant or animal that indicates by its presence in a given area the existence of certain environmental conditions.
Etymology: (1660–70; < ML)
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| Definition of 'Indicator' |
Princeton's WordNet |
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1. (noun) index, index number, indicant, indicator
a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
2. (noun) indicator
a signal for attracting attention
3. (noun) indicator
a device for showing the operating condition of some system
4. (noun) indicator
(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
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1. (noun) indicator
sth that shows the state or condition of sth
high blood pressure as an indicator of diabetes; economic indicators
2. indicator
a needle that points to a number on a piece of equipment
The indicator was on "empty."
3. indicator
turn signal
Use your indicators.
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| Definition of 'Indicator' |
Webster Dictionary |
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1. (noun) Indicator
one who, or that which, shows or points out; as, a fare indicator in a street car
2. (noun) Indicator
a pressure gauge; a water gauge, as for a steam boiler; an apparatus or instrument for showing the working of a machine or moving part
3. (noun) Indicator
an instrument which draws a diagram showing the varying pressure in the cylinder of an engine or pump at every point of the stroke. It consists of a small cylinder communicating with the engine cylinder and fitted with a piston which the varying pressure drives upward more or less against the resistance of a spring. A lever imparts motion to a pencil which traces the diagram on a card wrapped around a vertical drum which is turned back and forth by a string connected with the piston rod of the engine. See Indicator card (below)
4. (noun) Indicator
a telltale connected with a hoisting machine, to show, at the surface, the position of the cage in the shaft of a mine, etc
5. (noun) Indicator
the part of an instrument by which an effect is indicated, as an index or pointer
6. (noun) Indicator
any bird of the genus Indicator and allied genera. See Honey guide, under Honey
7. (noun) Indicator
that which indicates the condition of acidity, alkalinity, or the deficiency, excess, or sufficiency of a standard reagent, by causing an appearance, disappearance, or change of color, as in titration or volumetric analysis
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| Definition of 'Indicator' |
The Standard Electrical Dictionary |
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1. Indicator
(a) An apparatus for indicating the condition of a distant element, such as the water level in a reservoir, the temperature of a drying room or cold storage room or any other datum. They are of the most varied constructions.
(b) The receiving instrument in a telegraph system is sometimes thus termed.
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| Definition of 'Indicator' |
Dictionary of Military and Associated Terms |
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1. Indicator
In intelligence usage, an item of information which reflects the intention or capability of an adversary to adopt or reject a course of action.
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Sense: a pointer, sign, instrument etc which indicates something or gives information about something
the indicator on the petrol gauge of a car.
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 Afrikaans: aanwyser |
 Arabic: مُؤَشِّر، مِقْياس |
 Bulgarian: показател |
 Brazilian: indicador |
 Czech: ukazatel |
 German: der Anzeiger |
 Danish: måler; indikator |
 Spanish: indicador; intermitente ( |
 Estonian: näitur |
 Farsi: نشانگر |
 Finnish: ilmaisin |
 French: aiguille |
 Hebrew: מַחווָן |
 Hindi: सूचक |
 Croatian: pokazivač, indikator |
 Hungarian: jelzőkészülék |
 Indonesian: penunjuk |
 Icelandic: vísir; mælir |
 Italian: indicatore |
 Japanese: 表示器 |
 Korean: 지시, 표시 |
 Lithuanian: indikatorius, rodyklė |
 Latvian: indikators; rādītājs |
 Malay: penunjuk |
 Dutch: wijzer, meter |
 Norwegian: viser, nål, indikator |
 Polish: wskaźnik |
 Persian: نشانگر |
 Pashto: ښوودونكي |
 Portuguese: indicador |
 Romanian: indicator |
 Russian: стрелка; указатель |
 Slovak: ukazovateľ |
 Slovenian: kazalec |
 Serbian: indikator |
 Swedish: visare, mätare |
 Thai: ตัวบอก; เครื่องบอก |
 Turkish: ibre |
 Taiwanese: 指示器 |
 Ukrainian: індикатор; покажчик |
 Urdu: نشاندہی کرنے والا |
 Vietnamese: dụng cụ chỉ thị |
 Chinese: 指示器 |
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Definitions of Indicator 
