Definition of thresh verb from the Oxford Advanced American Dictionary

     

    thresh

     verb
    verb
    NAmE//θrɛʃ//
     
    Verb Forms present simple I / you / we / they thresh
     
    he / she / it threshes
     
    past simple threshed
     
    -ing form threshing
     
     
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  1. 1[transitive] thresh something to separate grains of rice, wheat, etc. from the rest of the plant using a machine or, especially in the past, by hitting it with a special tool Topic CollocationsFarminggrowing food and raising animals plant trees/seeds/crops/vines/barley grow/produce corn/wheat/rice/fruit plow land/a field sow/harvest seeds/crops/fields spread manure/fertilizer on something cultivate/irrigate/water/contaminate crops/plants/fields/land damage/destroy/lose your crop ripen/pick fruit/berries/grapes press/dry/ferment grapes grind/thresh grain/corn/wheat raise/rear/keep chickens/poultry/cattle/pigs raise/breed/feed/graze livestock/cattle/sheep butcher/kill/slaughter livestock preserve/smoke/cure/salt meatmodern farming run a fish farm/an organic dairy farm engage in/be involved in intensive (pig/fish) farming use/apply (chemical/organic) fertilizer/insecticides/pesticides begin/do/conduct field trials of GM (= genetically modified) crops grow/develop GM crops/seeds/plants/foods fund/invest in genetic engineering/research improve/increase crop yields face/suffer from/alleviate food shortages label food that contains GMOs (= genetically modified organisms) eliminate/reduce farm subsidies oppose/be against factory farming/GM food promote/encourage/support organic/sustainable farming
  2. 2[intransitive, transitive] thresh (something) to make, or cause something to make, uncontrolled movements synonym thrash
 
noun [uncountable] a threshing machine
See the Oxford Advanced Learner's Dictionary entry: thresh