Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
premiss is a noun and verb meaning "a statement that is assumed to be true and from which a conclusion can be drawn". It carries 2 recorded senses.
a statement that is assumed to be true and from which a conclusion can be drawn
“on the assumption that he has been injured we can infer that he will not play”
take something as preexisting and given
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 premiss come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.