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noun in·di·ca·tor \ˈin-də-ˌkā-tər\

Simple Definition of indicator

  • : a sign that shows the condition or existence of something

  • : a pointer or light that shows the state or condition of something

  • : a device that shows a measurement

Source: Merriam-Webster's Learner's Dictionary

Full Definition of indicator

  1. 1 :  one that indicates: as a :  an index hand (as on a dial) :  pointer b (1) :  gauge 2b, dial 4a (2) :  an instrument for automatically making a diagram that indicates the pressure in and volume of the working fluid of an engine throughout the cycle

  2. 2 a :  a substance (as litmus) used to show visually (as by change of color) the condition of a solution with respect to the presence of a particular material (as a free acid or alkali) b :  tracer 4b

  3. 3 :  an organism or ecological community so strictly associated with particular environmental conditions that its presence is indicative of the existence of these conditions

  4. 4 :  any of a group of statistical values (as level of employment) that taken together give an indication of the health of the economy


play \in-ˈdi-kə-ˌtȯr-ē\ adjective

Examples of indicator in a sentence

  1. Economic indicators suggest that prices will go up.

  2. a control panel with various indicator lights


First Known Use of indicator


Rhymes with indicator

abdicator, abnegator, activator, actuator, adulator, advocator, agitator, alligator, allocator, animator, annotator, applicator, arbitrator, aspirator, aviator, brachiator, buccinator, calculator, calibrator, captivator, carburetor, castigator, circulator, commentator, commutator, compensator, compurgator, concentrator, confiscator, congregator, consecrator, consummator, contemplator, corporator, correlator, cultivator, decorator, defalcator, delegator, demonstrator, denigrator, depredator, desecrater, designator, detonator, deviator, dissipater, dominator, dura mater, educator, elevator, emulator, escalator, estimator, excavator, explicator, expurgator, extirpator, fabricator, fascinator, figure skater, flocculator, formulator, fornicator, fractionator, fumigator, generator, gladiator, hesitater, hibernator, imitator, immolator, impregnator, incubator, infiltrator, in-line skater, innovator, inhalator, inspirator, instigator, insulator, integrator, lacrimator, liberator, liquidator, literator, lubricator, macerator, masticator, mediator, mitigator, moderator, modulator, motivator, mutilator, navigator, nomenclator, nominator, numerator, obturator, operator, orchestrator, oscillator, peculator, percolator, perforator, perpetrator, pia mater, pollinator, postulator, procreator, procurator, promulgator, propagator, punctuator, radiator, re-creator, remonstrator, renovator, resonator, respirator, revelator, roller skater, rubricator, rusticator, salivator, second-rater, selling-plater, separator, simulator, stimulator, subjugator, Sunset Crater, syncopator, syndicator, tabulator, terminator, vaccinator, vacillator, valuator, venerator, ventilator, vindicator, violator, vitiator

INDICATOR Defined for Kids


noun in·di·ca·tor \ˈin-də-ˌkā-tər\

Definition of indicator for Students

  1. 1 :  a sign that shows or suggests the condition or existence of something

  2. 2 :  a pointer on a dial or scale

  3. 3 :  1dial 3, gauge

Medical Dictionary


noun in·di·ca·tor \ˈin-də-ˌkāt-ər\

Medical Definition of indicator

  1. :  a substance (as a dye) used to show visually (as by a change in color) the condition of a solution with respect to the presence of a particular material (as a free acid or alkali) <litmus and phenolphthalein are acid-base indicators>

Seen and Heard

What made you want to look up indicator? Please tell us where you read or heard it (including the quote, if possible).


to conspire or plot

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