Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
threshing is a noun meaning "the separation of grain or seeds from the husks and straw". It carries one recorded sense.
the separation of grain or seeds from the husks and straw
“they used to do the threshing by hand but now there are machines to do it”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for threshing come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.