1. [ 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 indicant index_number
Related terms: fact leading_indicator Dow_Jones price_index short_account stock_index business_index
2. [ noun ] a device for showing the operating condition of some system
Related terms: device level pilot_light dial annunciator fuel_gauge gnomon cursor pointer scale test_paper tidemark air_sock
3. [ noun ] a signal for attracting attention
Related terms: signal reference_point bespeak
4. [ noun ] (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
Related terms: coloring_material acid-base_indicator absorption_indicator alpha-naphthol_test oxidation-reduction_indicator chemistry
Similar spelling:   indicatory