Definition of threshold in English:


Line breaks: thresh|old
Pronunciation: /ˈθrɛʃəʊld
, ˈθrɛʃˌhəʊld


  • 2The magnitude or intensity that must be exceeded for a certain reaction, phenomenon, result, or condition to occur or be manifested: nothing happens until the signal passes the threshold [as modifier]: a threshold level
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    • When the queue length for each output port exceeds a threshold value, the CS originates the cell inhibiting signal to all IXBs.
    • As soon as the measured pressure change exceeds the threshold, the EGR system is deemed to pass the restriction test, and the test method is terminated.
    • This outcome reduces the probability the signal will pass the detection threshold, resulting in a missed detection.
  • 2.1The maximum level of radiation or a concentration of a substance considered to be acceptable or safe: their water would meet the safety threshold of 50 milligrams of nitrates per litre
    More example sentences
    • Finally, salbutamol pretreatment might hasten lidocaine absorption and increase peak lidocaine plasma concentrations toward the toxic threshold.
    • At a conservative calculation, around 250,000 people are currently exposed to levels above the accepted safety thresholds.
    • Evaluation of substances for which a threshold limit did not exist were then carried out.
    lower limit, starting point, minimum, margin; Psychology limen
  • 2.2The level at which one starts to feel or react to something: he has a low boredom threshold
    More example sentences
    • Conditioned to expect immediate gratification, these youth have shorter attention spans and also a low threshold for boredom.
    • These mediators lower the nociceptor threshold, making the receptors more responsive to painful stimuli.
    • Lower pain thresholds and potentially lower thresholds for other nociceptive stimuli such as HTS would be consistent with systemic nociceptive dysfunction in CFS.
  • 2.3A level, rate, or amount at which something comes into effect: the inheritance tax threshold
    More example sentences
    • Without doubt, the 50 per cent increase in stamp duty rates and thresholds will have the single most negative impact.
    • On vacant land, the thresholds are $140,000 for metropolitan areas and $110,000 in regional areas.
    • The amount is below the threshold for inheritance tax, so there's no tax due immediately.


Old English therscold, threscold; related to German dialect Drischaufel; the first element is related to thresh (in a Germanic sense 'tread'), but the origin of the second element is unknown.

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a small amount; a little