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WordReference Random House Learner's Dictionary of American English © 2024in•di•ca•tor /ˈɪndɪˌkeɪtɚ/USA pronunciation n. [countable]- a person or thing that indicates.
- Mechanical Engineeringa pointing device, as a needle on the dial of a measuring instrument:The indicator showed 120 miles an hour.
- Mechanical Engineeringa light on a car that flashes to show which way the car will turn.
WordReference Random House Unabridged Dictionary of American English © 2024in•di•ca•tor (in′di kā′tər),USA pronunciation n. - a person or thing that indicates.
- Mechanical Engineeringa pointing or directing device, as a pointer on the dial of an instrument to show pressure, temperature, speed, volume, or the like.
- Mechanical Engineeringan instrument that indicates the condition of a machine or the like.
- Mechanical Engineeringan instrument for measuring and recording variations of pressure in the cylinder of an engine.
- Chemistry
- a substance, as litmus, that indicates the presence or concentration of a certain constituent.
- a substance often used in a titration to indicate the point at which the reaction is complete.
- Ecologya plant or animal that indicates, by its presence in a given area, the existence of certain environmental conditions.
- Medieval Latin indicātor, equivalent. to Latin indicā(re) to indicate + -tor -tor
- 1660–70
Collins Concise English Dictionary © HarperCollins Publishers:: indicator /ˈɪndɪˌkeɪtə/ n - something that provides an indication, esp of trends
See economic indicator - a device to attract attention, such as the pointer of a gauge or a warning lamp
- an instrument that displays certain operating conditions in a machine, such as a gauge showing temperature, speed, pressure, etc
- a device that records or registers something, such as the movements of a lift, or that shows information, such as arrival and departure times of trains
Also called: blinker a device for indicating that a motor vehicle is about to turn left or right, esp two pairs of lights that flash when operated or a pair of trafficators
Also called: dial gauge a delicate measuring instrument used to determine small differences in the height of mechanical components. It consists of a spring-loaded plunger that operates a pointer moving over a circular scale- a substance used in titrations to indicate the completion of a chemical reaction, usually by a change of colour
- Also called: indicator species a plant or animal species that thrives only under particular environmental conditions and therefore indicates these conditions where it is found
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