Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
memorisation is a noun meaning "learning so as to be able to remember verbatim". It carries one recorded sense.
learning so as to be able to remember verbatim
“the actor's memorization of his lines”
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 memorisation come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.