INDICATOR • DICTIONARY ONE.COM • Definition of Indicator

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/ˈɪndəkˌeɪtər/ Listen

Indicator

noun

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. Synonyms: index, index number, indicant.

A signal for attracting attention.

A device for showing the operating condition of some system.

(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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"Indicator" Quotes from Famous Books

... of 1,300 pounds was sanctioned by the Local Government Board for defraying the cost of the extension of the Reference Library and fittings, the purchase of a Cotgreave Indicator, installed in 1897, the restoration of the exterior stonework of the building, and interior decoration and repairs. The total expenditure amounted to 1,740 pounds, the difference between the cost and the amount of the loan ...

— Three Centuries of a City Library • George A. Stephen

... the two sides of the water to the inevitable result of opening it to home-circulation—the necessity of knowing whether a given book is or is not on the shelves. The American response was to open the shelves, the British, to create an additional piece of machinery—the indicator. These two results might have been predicted in advance by one familiar with the temper of the two peoples. It has shown itself in scores of instances, in the front yards of residences, for instance—walled off in England and open to the ...

— A Librarian's Open Shelf • Arthur E. Bostwick

... the white locks of Thorwaldsen was such an one,—the eye of immortal youth, the indicator of the man's whole aspect in a future sphere. We have scanned such eyes closely; when near, we saw that the lids were red, the corners defaced with ominous marks, the orb looked faded and tear-stained; but when we retreated ...

— Woman in the Ninteenth Century - and Kindred Papers Relating to the Sphere, Condition - and Duties, of Woman. • Margaret Fuller Ossoli

... Passero has several messengers who travel to and fro in secret. Mademoiselle Lisette was once one of them. She has travelled many times the length and breadth of Europe. But nowadays she is an indicator—and a very clever one indeed," he added ...

— Mademoiselle of Monte Carlo • William Le Queux

... illuminated shops on either side. On his right stood a weighing machine and an automatic figure. Without a moment's hesitation he jumped on the little platform of the weighing machine and slipped a penny in the slot. As he was quite sure that he weighed eleven stone, he could not help smiling when the indicator registered only one. Either the machine has gone wrong, he thought, or I have been transported to some other planet, ten times larger, or ten times smaller than the earth; he had been a pupil at the School of Navigation, you see, and knew ...

— In Midsummer Days and Other Tales • August Strindberg

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